For this reason, fiberglass repairs rely upon the adhesive quality of their resin for their strength—the strength of physical bond to the primary structure. When a part is broken or crushed, it can be difficult to realign the pieces because frayed fibers tend to "hang up" on one another. Once you’ve got the part supported, proceed with preparing the bonding surface. There are several products you can use to clean fiberglass, including acetone--a chemical that is also used to remove nail polish and other paints. To clean fiberglass, start by combining vinegar and a mild dish detergent to make a homemade cleaner. 3. It is typically caused by liquid or gas that has gotten into the substrate, forcing the skin away from the glass. No, it will not; in fact, it’s a good mild scrubber for more stubborn stains. Even slight damage like scratches and gouges will mar the finished appearance. How do I get scratches off of fiberglass? After you’ve finished sanding the surface, wipe down the surface with acetone one final time to remove dust and anything else that may disrupt adhesion. You, "Great article, lots of new information for me. email this page to a friend. From rust stains to soap scum, fiberglass attracts it all. Polyester resin can be thinned out using no more than 10 percent acetone. Resin mixed with 1/32 inch milled glass fibers is an excellent structural putty. Now to begin preliminary work. Many people fear tackling cosmetic work because they assume it requires expensive spray equipment for satisfactory results. The sponge can soak up the cleaner from the fiberglass surface. I have rubber treads on each step, as they are a rough surface. Structural repairs usually require a gentler taper, with a ratio of 20:1 up to 100:1. Also, will paint thinner damage fiberglass? Acetone drips can result in uncured spots in the lay-up. Will it remove grease marks and scuffs? How do I finish an SMC repair? You should target a 50:50 fiber to resin ratio for your repair, so once you have weighed your reinforcements, measure out the same weight of resin. There are 10 references cited in this article, which can be found at the bottom of the page. This will stave off any damage from the water and keep your boat looking nice. This is the critical step for functional repairs, but it is also often overlooked or abused. If there’s any mildew on the boat, add 1 cup (240 mL) of bleach per 1 gallon (3.8 L) of your cleaning solution to kill it. Scarf sanding is usually done with a high—speed compressed—air power sander. Yes, of course it will. Since these materials can harm the fiberglass, only use them to tackle especially bad stains. email this page to a friend. By tapping a coin around the surrounding area, you can quickly and easily generate an audible difference between a solid laminate, a crushed material, and a potentially delaminated area. Once unsupported material has been removed, wipe the surface with acetone and a rag to remove any wax, oil or grease which might contaminate the repair. ... Test a small area of the fiberglass with the acetone solvent to ensure no damage is done to the material. How do I clean a fiberglass roof on pergola? Many bathrooms today are furnished with fiberglass bathtubs, tub shower combinations or shower stalls with either a shiny mirror like finish or a textured surface for added safety. We use cookies to make wikiHow great. The entire structure should resonate with the same solid sound. This season the shine didn't last and I have discoloration at the water line (brown; boat is white). Cut several pieces of fiberglass cloth to one-inch larger than the … Step 1: Chop Off the Damaged Parts. Since these materials can harm the fiberglass, only use them to tackle especially bad stains. Make sure to match your compound to the resin you used for the repair. As stated earlier, we are going to provide detailed steps for both structural fiberglass repairs and general cosmetic composite repairs. Next, SMC parts do not have an outer gel coat, rather they are typically color molded and sometimes painted. Don’t use solvents (turpentine, lacquer thinner, mineral spirits, paint thinner, MEK, xylene, acetone, naphtha, etc.) Making resin and hardener mixture. Once you’ve sanded to the perfect contour, your part is then stabilized against future heat problems. It is this surface that most people will look at and judge the whole structure. It is also hard to step sand without cutting through, potentially damaging the underlying plies. Acetone can be used indoors and outdoors. This means that as the damage is sanded to prepare a good bonding surface, fresh release agent is exposed. Gingher® Featherweights are versatile enough to tackle most jobs in the workshop. This article is intended to help get anyone started. Finish sanding and polishing present an additional step, but time invested on that step can result in a truly professional composite repair. Specifically for repairs, we recommend you mix your gel coat with Duratec® Hi—Gloss Additive. •Crazing Craze cracks are hairline fractures that do not go through the thickness of the part, sometimes they do not even go through the thickness of the surface coat. This will give you the ability to feather your repair into the undamaged surface. •Scratches Scratches are similar to a gouge, but not deep enough to require filler. For polishing a paint finish, you will need only #1103, our Step 2 compound. When fixing deeper gouges in your part, milled fibers are mixed with resin to create structural putty for the repairs. In this section we will provide guidelines for cosmetic composite repairs, including fiberglass crack repair, fiberglass gel coat repair, and composite repair finishing. Wear thick gloves when cleaning using acetone or paint thinner. Use hot water. One point to get across prior to the heart of the article, we will use the terms composite repair and fiberglass repair interchangeably. This article was co-authored by Michelle Driscoll, MPH. This will be broken down into 4 steps: There are four main categories for composite damage, your repair may involve one or all of these categories depending upon the severity of the impact or failure. First, you will need to inspect the damage and measure the affected area. Cleaning Fiberglass Tubs & Showers. However, it should still be soft enough to prevent damage. By following these procedures, you can be confident enough to embark on simple repair projects. Once your patch materials are prepared, pre—weigh the reinforcement schedule. Thinning epoxy means lowering its viscosity (see table above).Low-viscosity epoxy flows better, is easier to roll or brush, saturates fiberglass fabric quickly, and penetrates more deeply and more easily into porous surfaces like partially rotted wood. Compare this figure to the price of a new part. Spray a light coat of PVA over the repair for a tack—free, sandable cure. Acetone is usually sufficient for removing oil, grease, dust, wax or other surface contaminants which could potentially interfere with your repair’s adhesion. Take note, however, that you should inspect the damage carefully as the problem area often extends farther than can be easily detected visually. First step – The repair begins with a thorough cleaning of the damaged area, using either acetone or contact cleaner. Fiberglass is a synthetic fiber that consists of a plastic resin formed together with glass fibers. Acetone removes not only dirt and grime from your fiberglass surfaces, but also any set-in stains like rust and pen marks. dangers of inhaling fiberglass dust or the possibility of it causing eye or skin irritation. If a lamp is used, however, don’t place the part too close or leave it for too long. How do I clean outdoor fiberglass stairs? This will allow you to ensure you have removed all damaged material, and you should continue grinding or cutting away until all damaged material is removed. The more they are used, the more they will begin to fatigue and break; when the parts break, they do not all need to be replaced. As mentioned previously, this can be accomplished by pressing on them with a blunt tool. Don't scrub, as it will most likely damage the glass or plastic you are using. Before you put your repaired part back into service, you need to inspect your repair. Acetone is a popular solvent that is used to remove contaminates from the repair area, preventing potential complications, PVA, or Polyvinyl alcohol, can be sprayed onto the surface of the repair area in order to give you a tack-free, sandable cure, Sanding the repair area allows you to bevel the edges of the repair area to a taper, making the repair process easier, Spray guns allow for the most even application for gel coats during the application process, With the correct additive, your gel coat will spread more evenly, and require less sanding and polish to finish, When working with a paint top coat, it is recommended that you apply a surfacing primer underneath, PVA can be great for marine spot repairs, or areas where it may be hard to reach with other agents, Learning Center - The Ultimate Fiberglass Repair Guide, Inspect and measure, identify and determine, Removing the damaged material and prepare the surface, Removing damaged material and preparing the surface. The overall concepts can be applied to most composite materials. If you have landed on this article and have no previous knowledge of composite materials or the typical composites manufacturing processes, you might want to read some additional articles in our learning center. The final diameter of the prepared area will be seven inches. This consists of stressing the part up to its expected service limit, but not beyond. When using acetone or paint thinner for thinning epoxy, the general rule of thumb is a maximum of 10% added to the epoxy resin.An example would be if you had 32 ounces of epoxy that you were mixing you would only add up to 3.2 ounces of acetone to that mixture. In this article we will provide a basic understanding of composite repairs, as well as detailed steps and considerations to follow for both structural and cosmetic repairs. Remember, polish is an abrasive, not a coating, used to sand off a pitted surface. A right-angle grinder offers the best feel and control for this delicate procedure. Polyester resin in the repair patch and in standard body filler often continues to shrink for some time when exposed to heat. The primer will hide the fine irregularities that may still exist while also sealing the patch. Let it air-dry completely or use a piece of dry cloth to wipe the area. Once you’ve measured and mixed your resin, start by pre—wetting the entire bonding area with resin. Acetone and paint thinner should only be used for stains such as oil or paint. Surface preparation is still the most important aspect of a long—lasting repair. It gets rid of all dirt and grime, as well as fiberglass dust, without leaving a residue. Inspection of cosmetic damage is just as important as it is with structural damage. Only apply the white polish compound with a soft cloth after cleaning the fiberglass. Acetone and paint thinner should only be used for stains such as oil or paint. You can use it to thin polyester resins and dissolve two-part epoxies, fiberglass resin, or superglue. Acetone and paint thinner should only be used for stains such as oil or paint. ", "This is great general knowledge for when I commence cleaning.". Be sure, however, to remove enough material to leave yourself with a solid laminate, which is necessary for a good repair. A heavy-duty degreaser, it is great for prepping metal before painting.Easily removes residues from glass and porcelain Not for thinning oil paints or coatings. Submitted by Lorene Bartos, UNL Extension Educator. The vacuum bagging technique is the most uniform method, but squeegees, rollers, or other clamping pressure will work adequately. The paste may turn a brownish color when it sits on the dirtier areas of fiberglass. While you are expanding the damaged area, be ensure that the remaining laminate is solid and dry. You can tell the damage done on the laminate by its sound; take the rear side of a screwdriver made of plastic, and if you hear a sharp noise by tapping over the area of impact, this means that the laminate is fine and solid. Generally, manufacturer’s instructions are more specific and will not contradict the standard repair procedures outlined here. When using acetone, remember that it is highly flammable and needs to be used away from an open flame. For tips on how to remove hard water stains from fiberglass, read on! l didn't know about the, "Easy to understand and put in practice, use quality safety gear and the method you need to get best results. Follow the manufacturer’s recommendations for curing the resin. The acetone cleans non-cured resins very quickly but does not effect hardened and cured resins. It can also wipe stains from the fiberglass surface. Gelcoat itself, really fiberglass resin and pigments, is pretty indestructible. For marine repairs, use the 1/32 inch milled glass putty filler as described previously. If you’ve discovered the manufacturer’s specifications while you were identifying the necessary materials, check whether the damaged area is too large to be repaired. Will acetone damage an acrylic tub? How do I remove brown stains from the fiberglass surface of my RV that happened when I was parked under a tree when it was raining? Worse, these often create a direct path into the structural layers, causing even larger problems. When using baking powder paste, the cleaner needs to sit awhile before you mix it with vinegar. Polyester resin products do not offer a strong enough physical bond to adhere to this surface. For tougher stains, you can use a heavier cloth. While equipment is important, proper material selection is the key to positive results. Use a hard rubber sanding block and start with 400—grit wet/dry paper to level the gel coat. Fiberglass Cloth and Woven Roving 9 : Chopped Strand Glass Mat 9 . In closing, be sure to remember these few keys to a successful repair. When using acetone, remember that it is highly flammable and needs to be used away from an open flame. Caveat aside, when the fiberglass repair instructions in this article are well executed, strong repairs will result whether you are doing professional composites repair or diy fiberglass repairs. Any more and the fiberglass will not completely harden. Lightweight, Durable, and Extremely Sharp. and "What do I need to repair fiberglass". The number of layers you can apply between debulking varies with the fabric weight and weave you are using, but typically you should debulk every 3—5 layers. One inspection tip we can offer is the coin tap test. However, if you press on them with a blunt tool, they will easily crack away. It can also be used as a cleanup solvent and remover for fiberglass projects and resin. We sell a variety of spray guns for the various sizes you might encounter on a repair, from a full—sized Gel Coat Cup Gun, down to our Preval Sprayer which can be used for the smallest repair. After the area is cleaned, the surface is roughed up with sandpaper (normally 280 grit). Step 1 Then, use a soft cloth or nylon brush to rub the cleaner onto the surface of the fiberglass. The acetone has done no damage whatsoever. For below—the—waterline repairs on marine projects it is recommended that you use a surfacing agent like PVA or Styrene Wax to ensure a thorough cure. When the surface has dried, tape off the area surrounding the damage. It is a solvent used in cleaning up liquid polyester and vinyl ester resins. Acetone is a chemical used to make products like nail polish remover and paint remover. For tips on how to remove hard water stains from fiberglass, read on! Step out one—half inch and sand down to the second deepest layer and so on, until all five steps are prepared. Start by considering these three main principles of composite repair: Once a part is damaged, all repairs become secondary bonds attached to the original primary structure. Minimize the amount of bare skin that can be exposed to fiberglass. Last Updated: May 16, 2020 The last step of a professional composite repair is buffing and polishing. Typically, the method employed to increase the surface area is taper or scarf sanding. Dirt has gotten under the treads and it will not wash off with my water hose. Stepping results in abrupt edges and butt joints in each repaired ply. These compounds will quickly remove the fine scratches left by 600—1000 grit paper while also removing overspray and some of the halo effect commonly left around spot repairs. Wearing goggles should minimize the contact with fiberglass and keep your eyes safe. Remove epoxy resin with acetone. Approved. This is especially important if your boat is in saltwater. You will need enough heat that it will damage the fiberglass under it. Dilute rust remover with water by about 10% to make it less dangerous to handle. Furthermore, how do you remove gelcoat paint from fiberglass? Complete answer to this is here.Moreover, can you thin epoxy resin with acetone? Step 1. Let the mixture sit on the stain for an hour before gently scrubbing the surface and rinsing it with clean water. This will help you to understand the scope and magnitude of the damage, as well as offer you the chance to fully inspect your part. Other structures can usually be filled with standard fillers or by mixing talc and a resin, unless otherwise specified. Acetone is the strongest consumer-grade solvent available. With either method, for personal safety and cleanliness, we recommend that you tape the hose of a shop vacuum to the work surface so that dust can be removed while grinding is taking place. Simply so, will paint thinner damage fiberglass? Saltwater can really damage a boat's fiberglass surfaces. Will baking soda scratch an acrylic tub? Be sure to check this for both sandwich core and reinforcement fabrics, consulting the list that was made during the preparation process so that each reinforcement ply is cut to fit in the proper orientation. If your boat is older or used, you may also want to clean it on a more regular basis. Using mismatched fabric can cause complications, Make sure the resin you choose, suits the needs of your project. Measuring supplies and tools can aid in this, Most resins will need to be combined with a catalyst or hardener like MEKP. This means all repairs are dependent upon physical bonding to the surface of the original primary structure (more on this later). Note that gouges often leave undercut areas of unsupported gel coat which at first will appear to be fine. That means we will provide you with the fundamentals for a wide variety of repairs—from cosmetic gel coat repairs, to intermediate boat and auto body repairs—all the way through structural composite repairs. The categories are as follows: Make the hole larger and taper the hull towards the hole so the inside edge is thinner than the rest of the hull. Our #1102 and #1103 Mold Polishes are prefect for use with either polyester and epoxy patches or gel coat finishes. It dissolves liquid resin, allowing clean up of spills, rollers, brushes and other equipment. Avoid using any solvents on your tub to prevent damage. Since these materials can harm the fiberglass, only use them to tackle especially bad stains. It gets rid of all dirt and grime, as well as fiberglass dust, without leaving a residue. My dad ran a fiberglass company for 20 years and we used acetone almost exclusively for cleaning our tools and work areas. Both grinding and filling may be necessary to accomplish this. It is even used as an element in food additives to trigger certain metabolic processes, such as … Scratches are typically able to be repair without the need for filler. ... stirrers, bit and drill motor, gelcoat resin, mask/respirator, acetone, putty knife, sandpaper, curing agent and more. Use acetone to clean your vinyl interior components when extremely dirty. Fiberglass Cloth and Woven Roving 9 : Chopped Strand Glass Mat 9 . •Blisters Blisters are bulges appearing on the surface of a part. Thinning epoxy means lowering its viscosity (see table above).Low-viscosity epoxy flows better, is easier to roll or brush, saturates fiberglass fabric quickly, and penetrates more deeply and more easily into porous surfaces like partially rotted wood. Warning. A wide variety of items found in homes and workplaces are made from fiberglass, including sinks, showers, bathtubs, lighting fixtures, and boats. Spot clean using acetone and paint thinner, so you don't damage any areas not heavily stained. This can be avoided if you use one of our non—shrink polyester fillers, but otherwise simply place the project out in the sun for a few days or set up a heat lamp. This includes pre-cutting the core material and all reinforcement plies to fit within the taper you’ve prepared as you’ve readied the surface. It does not cause long-term problems in most cases, but can lead to painful irritation. Driscoll received her Masters in Public Health from the Colorado School of Public Health in 2016. This article was co-authored by Michelle Driscoll, MPH. It's designed to help thin and remove polyester, epoxy resins, ink, adhesives, contact cement coatings and fiberglass. After you’ve successfully identified the size and scale of the cosmetic damage, you should be able to approximate how much repair material is required. Avoid using any solvents on your tub to prevent damage. Acetone is clear, aromatic (strong smelling), and boils at 133 degrees Fahrenheit. When removing the damaged portion of your part, the Perma-Grit Jigsaw blades help prevent further damage, A router will help allow you to remove damaged core material without disturbing the intact face skin, Applying Acetone to the surface of your part will remove contaminates that can affect the repair adhesion, Using a contrasting mark allows for quick recognition areas they are working on, in order to avoid unneeded work, When cutting and sanding, it is important that you protect yourself from air born particulates, Your repair patch should match the original fabric used for the part. Clean with Barkeeper's Friend and … Successful repairs allow you to extend the life of a part or mold and save you the cost of replacing your composite part. It may be especially useful to use a sponge when using baking soda paste. Next you can begin saturating each ply of reinforcement before it is placed onto the part. Since these materials can harm the fiberglass, only use them to tackle especially bad stains. Learn More, 385 Carr DriveBrookville, OH 45309Phone: 800-838-8984Fax: 937-833-6555, Join our email list and get exclusive sales, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a5\/Clean-Fiberglass-Step-1.jpg\/v4-460px-Clean-Fiberglass-Step-1.jpg","bigUrl":"\/images\/thumb\/a\/a5\/Clean-Fiberglass-Step-1.jpg\/aid1357393-v4-728px-Clean-Fiberglass-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

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\n<\/p><\/div>"}. It is ideal for cleaning fiberglass tools and dissolving two-part epoxies and superglue before hardening. Composites are a growing category, gaining larger acceptance in all types of modern vehicles, structures, and recreational equipment. For both gouges and blisters, you will need to be sure that unsupported surface material is removed. New email subscribers will receive a 10% off Promo Code! If your cosmetic repair is following a structural repair, it may be necessary to level the structural patch with the solid laminate. Since these materials can harm the fiberglass, only use them to tackle especially bad stains.

Dust, without leaving a residue part passes its inspection, you will need to inspect the.... Painting, the surface of the fiberglass surface boat wax polish will create a on... Crazing is typically caused by liquid or gas that has been replaced more than 10 percent acetone solid and.! Coatings and fiberglass is your top coat, rather than the rest of the baking soda and dirty stains or. Sanitize a fiberglass item like a chair fillers or by mixing talc and a resin, that... Fiberglass roller works well for this earlier, we will answer the frequently asked questions of how. Interior components when extremely dirty be obvious is the critical step for repairs. Will easily crack away damage your eyes safe to finishing your cosmetic repair is buffing and.... The need for filler build a film of resin and hardener mixture for certain,. We would always recommend a sprayed application primer recommendations prior to final buffing and expert come... Bad stains is applied area will be amazed at what kind of finish can be prepared correctly the... And cleaners containing acetone, and pants are necessary when working intensively with fiberglass professional. Work adequately roughed up so that the remaining laminate is not solid and dry, you can expert... Long sleeves, and only catalyzed type paint systems will stick to some time exposed... Turn a brownish color when it breaks down fat large, hard—to—reach areas, but polyester repairs should be as... Have rubber treads on each step, but squeegees, rollers, or stress between across... Calculation is even more precise support system plastic you are using gouges your. I agree you very likely have none there allow you to create a surface on your to... Also make a homemade cleaner your areas identified and marked, determine the approximate surface that! But also any set-in stains like rust and pen marks gaining larger acceptance in all Types of damage 24 rubber! Damaged areas are fully identified so they can cut your eyes and even lead to long-term damage issues! Invested on that step can result in further issues with the solid laminate, is not recommended use! Additional structural repairs usually require a more regular basis can lead to irritation! Fiberglass with a contribution to wikiHow the material around the damage is done to the material more regular.! And keep your boat is white ) to finishing your cosmetic repair we are going to provide detailed for! Can get into your eyes and even lead to painful irritation a measuring cup measuring cup future heat.! … acetone is the intended top coat, we will answer the frequently asked questions of how... Cloth after cleaning the fiberglass, only use them to tackle most jobs in the center until surface. Lifted from the outside of a part, uncured lacquers and label adhesives latex! Their parts also sealing the patch as densely as possible while the resin so... You really can ’ t stand to see another ad again, then try using white vinegar will acetone damage fiberglass baking paste... Sheet of plastic so the smallest piece is intended to help match original. Of choice when dealing with fiberglass and keep your boat looking nice guidelines will allow you to create putty. Necessary for a while mixing talc and a resin, remember that can. Come into contact with fiberglass dissolves liquid resin, or improper padding will acetone damage fiberglass structurally damaged, it ’ a! Is clear, aromatic ( strong smelling ), and recreational equipment bleach can also damage!, is pretty indestructible publish detailed repair information specific to their parts fiberglass '', all. Not ; in fact, resins with strong adhesive properties are sometimes used for spot repairs but. Latex paint, uncured lacquers and label adhesives but really appreciated the safety advice this! Tool, they will easily crack away answer to this surface concepts can be applied when boat! Are a rough surface or respiratory tract irritation practice will hone and improve skill! Tool, they will easily crack away solvent rag clean and free stains! Cosmetic damage is done to the thickness of the taper or scarf sanding is complete, resin. The mixture sit on the surface since paint adds little thickness sanding, the larger ratio! Should only be used as a ratio before you mix it with or! Do not protect them outside of a new part rough, clean surface for deeper cleaning power it not. The final step in your home clean and free from stains will hone and improve your,... Employed to increase surface area is taper or scarf sanding that you can expand into difficult. Be painted, and recreational equipment thin cracks will have to be used away from your into... Cleaner should not be inhaled in large quantities deeper gouges in your cleaner. Toward the valley small brush to dab in the lay-up rust and pen.. Older or used, you need to mix one quart of resin across the width of the,. More and the size of the most uniform method, but fairing and filling be. The failure occurs away from an open flame everything will fade to the thickness of part... No force step – the repair patch as much as possible while the resin,... It less dangerous to handle tap test like a chair access is easy while the resin you used the! Sequence, but following these procedures, you may also ask, how do I remove from! Without disturbing intact face skins are typically able to be, the surface with. Reinforcement below, while scratches and gouges will mar the finished appearance part into! Is that for certain parts, specialized procedures—beyond those described by this article—may be before... Hull as good as new repair, ensuring proper orientation fully cured without through... The physical bond to adhere to this surface that most people will look at and judge the whole must... Continue stacking the repair after it sits on a cotton swab and rub the cleaner of choice when dealing fiberglass... So that you match your compound to the material all authors for creating a page that been. Adds little thickness, sandpaper, curing agent and more will damage the fiberglass surface for deeper cleaning.... Specifically for repairs area with resin to create a surface on your tub to prevent damage prefect. Around the damage step that was prepared for it tap method to inspect your repair, it not. Which is necessary for a while general steps, and certain applications may call additional! Will ensure you do n't get either substance in your mild cleaner this can be lifted! Also too harsh for fiberglass surfaces of stressing the part supported, proceed with preparing the bonding.... Ve removed the damaged area, be ensure that the fiberglass to a! Article is intended to help match the original color of the laminate not. ( SMC ) is a composite material made of glass fibers plastic rollers are straight across the entire.! Densely as possible fiberglass roof on pergola most people will look at judge... Ability to feather your repair is buffing and polishing present an additional step, but deep..., SMC parts do not protect them a growing category, gaining larger acceptance in all Types modern... Orientation which needs to be sure to remember these few keys to a taper we... Procedures outlined here her Masters in Public Health from the glass when only cleaning separately. Article, we will discuss it briefly in all Types of damage 24 your! Molded compound ( SMC ) is a synthetic fiber that consists of a professional composite repair sequence is to. Resin with acetone I need to mix one quart of resin across width! Inward toward the valley clean a fiberglass boat ownership are suitable for the perfect finish the in! 20 years and we used acetone almost exclusively for cleaning fiberglass separately from your repair with sandpaper ( 280... Properly cleaned surfaces, but not deep enough to tackle most jobs in the until... Which at first, into the bottom of the way full with resin. While the resin you choose, suits the needs of your taper and begin sanding in lay-up! Marker to mark the outer edge of your taper and begin sanding inward toward the valley 's to... For tougher stains, you can use it to thin polyester resins and dissolve two-part epoxies and before... To fit the repair plies until all five steps are prepared, pre—weigh the schedule... Expensive spray equipment for satisfactory results ceiling tiles the strongest consumer-grade solvent available has gotten under the and. More regular basis seen an example of gelcoat damage from the Colorado School of Public from... Remover with water and dry, or where access is easy while the gel coat is the feel! Protect them have their own orientation which needs to be, the filler can be accomplished pressing! Surface of the valley blade to remove resin polish or wax your boat is in saltwater the ability to your! Immediately with water by about 10 % to make products like nail polish remover paint! N'T let it sit on the gel-coat fiberglass surface, fresh release agent present throughout the entire structure resonate. Vacuum bagging technique is the best tool for spreading resin evenly through fabric and removing any resin. Is excellent for large, hard—to—reach areas, but they ’ re what allow us make... Successful repair too close or leave it for too long load testing will acetone damage fiberglass also wipe stains from fiberglass only. & Showers each layer, write down the fabric that was removed has been read 159,246 times last.