What grit wet sand paper to remove hull oxydation ... PDF Cosmetic Gelcoat Repair Guide - Ashland Wet sand with 320-grit, followed by 600, then 1,200; then use a fine-grit polishing compound and a good wax. How to Fix Light Gelcoat Scratches - Boat Trader Blog Sand with 80 grit, clean, then go over top of that with the color matched gel. Shop with confidence - get free shipping to home or stores + price match guarantee! The plastic will also help to level and smooth the surface. Before making a spray patch, sand the area to be sprayed by hand. After sanding, make any needed repairs to the area. The Basic Guide to Sandpaper Grit - Fiberglass Coatings Restoring Your Gelcoat | Cruising World Roll on a minimum of three coats of WEST SYSTEM® Epoxy to seal the fiberglass before applying a finish coat of paint or gelcoat. Sanding the area insures a good mechanical bond of the spray patch to the part. Besides the grits and grades, sandpaper is made out of materials that vary chemically. A good tip so reduce porosity (especially if you rubbing a dark hull) is to hit it finely with something like 400/500 grit. Thin gel coat to your preferred viscosity using #70 Styrene Thinner or #1039 Duratec Clear Hi-Gloss Gel Coat Additive. STEP TWO - SANDPAPER. Start with 80-grit sandpaper and sand until the repaired area is level with the surrounding area. A. Sadly, the answer is no. STEP THREE - BUFF AND ENJOY! The Color Guide demonstrates a range of colors for colored gelcoat, which can be obtained by mixing the necessary colors. 1: Hand Buffer To Restore Your RV Gel Coat Shine. Will TotalBoat Aluminum Boat Etch Wash damage paint surrounding a repair? You should also feather the surrounding area of the gelcoat repair with 220/330. Short, random cracks are also referred to as gelcoat crazing. Remember to use a soft interface pad when sanding with the Step 4: Apply Filler Use a sanding block and sand in circular motions. If you need to remove a paint finish and varnish rapidly, you should opt for an 80-grit disc. Use a rubber squeegy in good light to see if the peel is gone then go to 2000 and do it again, then 3000 if your going for that deep shine. Confining work to the immediate repair area, continue wet-sanding with 600-grit paper until nearly even with surrounding gelcoat. When you do sand, you will want to wet sand with 1500+ grit. Saeed - A problem with rubbing any form of gel coat with sand paper is that by rubbing, you are introducing porosity into the gel coat. Step 5: Finish the Gelcoat. Step 3: Finish. Once the gelcoat is completely hardened (only a matter of hours, generally), it's time to blend the repair into the original surface. Ultra Fine 2500 Grit (50 sheets) 02045. This could be a remover of some sort, you have to experiment. Start by wet sanding with the finest grit to avoid adding any unnecessary sanding scratches. Each package includes 9" x 11" sheets of each of the following: 240, 320, 400, 600, and 1000 grit. yes you can just lightly sand clear coat and re-clear. West Marine will have kits and you can find them on the internet. After allowing the gelcoat to cure completely, you can then sand and buff your newly gel-coated surface. You will be surprised how much can be done just with the Color Restorer, which is simply a less aggressive rubbing compound. Spray enough gel-coat to allow for an approximate 20% shrink. Try using 400-grit wet-sanding sandpaper, followed by 600-grit. I know gel coat will take quite a bit of heat before it bubbles. Finish wet-sanding with 1,000-grit paper; then buff out with rubbing compound followed by a coat of wax. When sanding areas that have been filled with putty we suggest using 40 or 80 grit sandpaper, depending on how large the repair is. Always use a sanding block so you don't over-sand one particular spot, and use a gentle, circular motion. Step 3 Sand Scratch Refinement The purpose of sanding is to take off a layer of gelcoat revealing a new scratched up surface. Once the surface has been sanded and cleaned, apply two to three coats of finish. Wet sand the area to be painted with the 400-grit sandpaper. Youre missing about 4 steps in between 1000 grit and wax. Final sanding of the finish primer should be done with 320- to 400-grit sandpaper. Ensure that the surface is clean and dry and has been sanded with a coarse sandpaper, approximately 80 grit. Start by placing a small amount of base color within the gel-coat paste. Use 220 grit sandpaper to do the final repair sanding. Sand and Buff the Repair: (The Gel coat may still be a little tacky. Blend well. Shop, read reviews, or ask questions about Sandpaper Discs at the official West Marine online store. depending on how many coats you have on. Then sand in progression with If you do want to wet sand it, 1200 grit will get you to where light compound does. That is scary and unnecessary. When using styrene thinner, add to gel coat at 2-5% to lower viscosity and aid in spraying. Remember to use a soft interface pad when sanding with the 800 grit abrasive. Confining work to the immediate repair area, continue wet-sanding with 600-grit paper until nearly even with surrounding gelcoat. Finish wet-sanding with 1,000-grit paper; then buff out with rubbing compound followed by a coat of wax. A 320-grit disc should be used after each coat. Posted: August-12-2009 at 8:16pm. A 320-grit disc should be used after each coat. Scratches that don't penetrate down into the layers of fiberglass often can be wet-sanded flat and buffed back to a shine with no need for gelcoat at all. In doing so, your oasmosis protection is serverly reduced. Remove excess grease or fine particles off of the area by running a rag soaked in acetone over it. The trick will be accomplished by a power sander, bringing the blistered region back to the fiberglass. $84.03. I have never used a power sander in the process. You can go up to 2000 grit, on this job, we stopped at 1500 grit. A courser grit gives a better repair, particularly with dark colors. ammolo Fine Grit Wet Sandpaper, 120 to 600 Grit Sand Paper for Wood, Metal, Resin, Automotive, Plastic - 9x3.6 Inches (30 Pcs) 4.5 out of 5 stars 19 1 offer from $7.99 Sand down to 1500, then to 2000, then start buffing with a 300 grit compound on a wool pad, then 500 on a polishing pad, then we can wax. (If using color pigment see step 3). Take sandpaper. Sand the entire taped-off area with 360-grit paper and clean up with acetone. Sanding Sand gelcoat surface with 800 grit abrasive on a dual action sander. A courser grit gives a better repair, particularly with dark colors. While what Gravy said would work well, I think it is a little overkill. . Pros we talked with prefer Sunmight, 3M, and Mirka sandpapers; they don't load up as quickly and last longer. Qty. What Grit Sandpaper For Wet Sanding Gelcoat? More Facts on Sandpaper Types. Be sure to switch between 120-grit and 220-grit to prepare the marine surface for varnishing. Remove all sanding Can you gelcoat over gelcoat? For highly oxidized and/or faded gel coat you will need to start with a 'heavy' compound. But keep in mind that both gel coat and marine paint need similar preparation work before one can apply either one to the boats surface. I need to find the fine-line between "perfection" and "obsession" with determining when is good-enough with sanding and how fine the grit to go when finishing my gelcoat finish on my boat. To get the best results, we recommend machine sanding with a 6 inch, 8mm orbital polisher/sander with an interface pad. You can pick up a gel coat kit and try to color match the spot. It will roughen up the gel coat's surface, and the paint will stay on place. Wet sanding: Start with 600- to 800-grit wet-dry sandpaper. 4. A poorly bonded patch will peel off when sanded. The only thing I would add is to not go over 220 grit sandpaper to give the gelcoat something to grab onto. Sanding the area insures a good mechanical bond of the spray patch to the part. Once the gelcoat has fully cured, sand the repair smooth (wet sanding works particularly well with gelcoat). The answer to this is no and yes. Often very minor scratches and scrapes can be wet-sanded away. Fine Sandpaper KIT. You can start with 220-grit sandpaper and, for a really slick surface, finish with at least 400- or 600-grit. You can buy a gelcoat spray gun online or at your local paint store. Before making a spray patch, sand the area to be sprayed by hand. Then you should wipe it with acetone as a final prep for your barrier coat. Most of the painters we spoke to recommended using 80-grit sandpaper for the first go-around, though a couple said you can start with 150- or even 220-grit, depending on the quality of the gelcoat . You will notice when the sand paper looses its bite, it dont take long ,get a new piece, buy a lot of paper as it will save you time. It is a thick liquid with a very abrasive grit. Finally, apply a coat of high-quality marine polish and your repair is complete. The kit includes Gel-Coat putty, hardener, applicator stick, #400 grit sandpaper, #600 grit sandpaper, polishing compound and alcohol wipe. That should remove debris and rough up the surface sufficiently to bind with a fresh gelcoat. You want to remove any of the shine from the gel coat to ensure adhesion. Then the sanding. You will need a buffer to compound out the scratches. At this point, you can use an 800 grit compound to compound the gelcoat. A low grit number determines the coarseness of the sandpaper which will give you the ability to remove materials and coatings. Tape off any sensitive items or adjacent areas that may be damaged from gelcoat spatter or accidental sanding. RPM. For more info . Start by dry sanding with 220-240 grit production paper to thoroughly remove the glossy layer from the gelcoat. 2,500 grit sandpaper (only for extreme cases of oxidation) — For wet sanding only if you've exhausted all other options, read the instructions below for wet sanding, and have consulted a professional. 5. Now wipe your surface clean of dust. STEP 6: Finish The Surface. When sanding flat areas use a rubber block. How to Fix Boat's Gelcoat Scratches STEP ONE - ACCESS THE DAMAGE. After gelcoat removal, sand the fiberglass laminate with 80-grit sandpaper. When you want to remove light oxidation from RV fiberglass, hand buffing is the way to go . I am rubbing my very old and tired GRP Hull down with a light 400 grit sandpaper before farecla 3 then 6 and then polish. Finally, apply a coat of high-quality marine polish and your repair is complete. It is acceptable to wipe off the tackiness with a cloth and acetone.) At this point, the repair is ready to prep and spray/brush with gel coat. ft.). Start with 600, 400 is too course, 800 might not take you down quick enough. Gel coat or the patch should be fine for this application. When applying, make sure you tape off the other areas outside the . The Gelcoat Tub and Shower Kit will cover approximately 18 square inches (1.5 sq. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Wet sand the area that you need to paint. Once the gelcoat has fully cured, sand the repair smooth (wet sanding works particularly well with gelcoat).You can start with 220-grit sandpaper and, for a really slick surface, finish with at least 400- or 600-grit. Do you need to sand gelcoat before painting? GIVEAWAY VIDEO : https://youtu.be/AFpmfOLVu-kIn this video I walk through the steps on how to wet sand, wax, and buff a boat in order to removed heavy or lit. Confining work to the immediate repair area, continue wet-sanding with 600-grit paper until nearly even with surrounding gelcoat. use a sanding sponge and lots of slightly soapy water, rinsing your paper out often. Wet-sand the cured gelcoat with 320-grit wet/dry paper on a soft sanding block. Roll on a minimum of three coats of WEST SYSTEM® Epoxy to seal the fiberglass before applying a finish coat of paint or gelcoat. You can start with a 400 or 320 grit paper and gradually move up to say 800 grit. Sandpaper Grit Sizing: If you are looking to remove a previous material such as gelcoat; begin sanding your surface with a 150 grit or lower. Part 3 covers wet sanding. If you are using our brushable gelcoat, you will want to let it sit overnight to ensure it's completely cured. Sand the area using a fine grit sandpaper and palm sander; sand thoroughly until the surface becomes dull, leaving little or no trace of the old gelcoat. Use 80 grit but don't over sand - just remove the shine from the gel coat. Working time is about 15-20 minutes. Sand an area about 3" to 4" around the repair. if you just want to re-clear lightly sand with 800 grit, DRY, sand paper or 1000 grit wet.12 jan. 2016. West Marine will have kits and you can find them on the internet. You can find high grit in automotive stores and boating stores. If there's any dirt or dust on the fiberglass, it will get trapped under the gelcoat. Once the fill area is level or contoured to the desired shape, sand with 100 grit paper to remove the course scratches from 40 or 80 grit. The paper can be folded and refolded to use its entire surface. Miro recommends starting out by dry-sanding with 180-grit sandpaper. Mask off the area around the repair. After gelcoat removal, sand the fiberglass laminate with 80-grit sandpaper. When combined with a wool pad it makes for rapid material removal and scratch removal. After this the hull must be thoroughly washed and dried. You can also apply masking paper to prevent overspray if you are using a spray gelcoat restorer. 400-grit sandpaper would be good enough. Once the gelcoat has fully cured, sand the repair smooth (wet sanding works particularly well with gelcoat). What is the recommended buffer speed when using TotalBoat TotalBuff and TotalBoat TotalShine? The gel coat is extremely thin, typically 010" to .020" thick. Tips for wet sanding gelcoat. 80 grit is a good place to start with no more than 120 grit on lighter colors. Ensure that all surfaces are void of any surface contami-nation prior to sanding any substrates. Wet-sand the cured gelcoat with 320-grit wet/dry paper on a soft sanding block. Set the speed of the dual action sander at 900 - 1100 Max. I would use 3M 05955 Super Duty Compound. Sand it down with 80 grit sandpaper until it's flush with the surface of the fiberglass. A warning about sanding the gelcoat: use caution to prevent sanding all the way through the gelcoat layer, which can open up pinholes in the fiberglass . The gel coat is extremely thin, typically 010" to .020" thick. Set the speed of the dual action sander at 900 - 1100 Max. You can pick up a gel coat kit and try to color match the spot. "Wet sand" the sprayed area with 320 grit sandpaper and water. Sanding Sand gelcoat surface with 800 grit abrasive on a dual action sander. It's important that the fiberglass is clean before you gelcoat over it. Use on tougher-to-sand marine paint, gelcoat and primer systems. A year ago I got my 1963 Correct Craft 17' Classic re-gelcoated (I did all of the prep work with removing, grind . Wet-sand the cured gelcoat with 320-grit wet/dry paper on a soft sanding block. Re: should i wet sand prior to buffing faded gelcoat mothers makes a great liquid buffing compound but it requires a high speed buffer and bonnet, I don't think I'd use 150 grit on the gel coat, that seems like a recipe for disaster. 180 would probably be about right. Be sure to switch between 120-grit and 220-grit to prepare the marine surface for varnishing. A poorly bonded patch will peel off when sanded. 3M is about the best you can get at a reasonable cost, they make great products. Finish wet-sanding with 1,000-grit paper; then buff out with rubbing compound followed by a coat of wax. If the scuff or scratch disappears, great. Once the fourth coat is completely dry, use the 80-grit paper over the whole vehicle to remove any rough spots. Sand with 80-grit sandpaper to create a surface that can provide a strong bond. You should also feather the surrounding area of the gel coat repair with 220/330. Wetsand with a block and buff to make it go away 80 grit is a good place to start with no more than 120 grit on lighter colors. Use for sanding gelcoat back to original show room finish. • Gelcoat is extremely sensitive to all forms of surface contamination. You can start with 220-grit sandpaper and, for a really slick surface, finish with at least 400- or 600-grit. First-things-first, access the damage. Sandpaper is a bigger subject than most people think it is. Most of the painters we spoke to recommended using 80-grit sandpaper for the first go-around, though a couple said you can start with 150- or even 220-grit, depending on the quality of the gelcoat surface. That all surfaces are void of any surface contami-nation prior to sanding any substrates buff out with rubbing compound by. Knowledgeable Associates happy to assist a reasonable cost, they make great products gelcoat has cured! 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The part marine will have kits and you can find high grit in automotive stores and boating stores the. 6: finish the surface surface contami-nation prior to sanding any substrates can use an grit... Sand and buff your newly gel-coated surface 400, then 600, then go over 220 grit sandpaper to the. # 70 Styrene Thinner or # 1039 Duratec Clear Hi-Gloss gel coat and! 400 or 320 grit grit to avoid adding any unnecessary sanding scratches see STEP 3....
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