
Fiberglass Boat Scratch Repair Guide
- Understanding Fiberglass. That means picking up some gel coat paste.
- Applying Gel Coat Paste. A good way to do this is to use the corner of the scraper.
- Long-Term Boat Fiberglass Maintenance. Rubbing Compound for your future cleaning needs.
How do you clean a fiberglass boat?
What You Will Need
- A long deck brush. A good long deck brush should feature durable bristles and blocks. ...
- Clean rug or cloth. Prepare a few large pieces of clean rug or cloth to dry the boat deck after cleaning. ...
- A pressure washer. ...
- Water bucket. ...
- Boat soap or deck cleaner. ...
- A fiberglass stain remover. ...
- Boat wax. ...
- Safety gear if needed. ...
How do you repair fiberglass damage to a boat?
How do you repair fiberglass damage on a boat? Fill any deep gouges and spend your time sanding out scratches while the filler sets up. Apply gel coat to the filled gouges and finish to the scratches and then final-sand the filled gouges. Buff all the repaired areas and then the rest of the boat. Apply any graphics to finish up.
How to repair a small hole in a fiberglass boat?
- First, examine the hole and look for cracks and chips extending out from the hole. ...
- Next, take a saw and cut out the damaged area that you’ve circled with the marker.
- Now that the holes cut out, you need to determine the thickness of the hull substrate and multiply that by 10. ...
What is the best fiberglass repair kit for boats?
West Marine – Gelcoat Repair Kit
- Ensures huge resistance for exterior matters
- Works excellent on the marine environment
- The simple application process for a DIY project
- Ensures maximum performance on fiberglass

How do you fix deep scratches on a boat?
Fill any deep gouges and spend your time sanding out scratches while the filler sets up. Apply gel coat to the filled gouges and finish to the scratches and then final-sand the filled gouges. Buff all the repaired areas and then the rest of the boat. Apply any graphics to finish up.
How do you repair a deep gouge in a fiberglass boat?
0:502:51How to Repair Deep Cracks in Fiberglass Boats - YouTubeYouTubeStart of suggested clipEnd of suggested clipUsing the disposable brush saturate it with epoxy. One at a time apply and saturate theMoreUsing the disposable brush saturate it with epoxy. One at a time apply and saturate the progressively smaller pieces of fiberglass.
How do you fix deep scratches in gelcoat?
Surface scratches can be buffed out of gelcoat with polishing compound, but deep scratches must be filled. When the gelcoat surrounding a scratch is in good condition, the filler of choice is gelcoat paste, which provides both filler and finish in a single application — but not a single step.
How do you fill in deep scratches?
1:5327:43How to Repair a DEEP SCRATCH in Car Paint (DIY) - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd add a layer of clear coat. And finally the fourth. Step is the blending. Step this is where we'MoreAnd add a layer of clear coat. And finally the fourth. Step is the blending. Step this is where we're gonna use some sandpaper. And polish to blend our new touch-up paint into the original.
How do you fix nicks in a fiberglass boat?
0:352:05A Revolutionary Way to Repair Fiberglass | MagicEzy 9 SECOND ...YouTubeStart of suggested clipEnd of suggested clipTurn the tube around and gently smooth with the specially designed level unlike other fillers only aMoreTurn the tube around and gently smooth with the specially designed level unlike other fillers only a tiny amount of pressure is required when leveling immediately clean the level with the tissue.
Can you repair fiberglass with epoxy?
Epoxy is a great adhesive One reason that an epoxy product such as WEST SYSTEM® Epoxy is so useful for fibreglass boat repairs is that it's an incredibly effective adhesive. It creates a resilient bond to fibreglass, cured polyester laminates, wood and metals – even when you only use a thin film.
How much does it cost to fix a scratch on a boat?
Fortunately, it's relatively inexpensive to do a fiberglass repair. Boat scratches, deep gouges, and even holes can cost less than $500 in materials.
How do you use rubbing compound on gelcoat?
0:215:30Compounding Gel Coat - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo the way we use is we use it with a low rpm starting 600 rpm and never going about 1800 rpm yourMoreSo the way we use is we use it with a low rpm starting 600 rpm and never going about 1800 rpm your heaviest cut is going to come at your low rpm. If you heats up to the higher rpms.
What grit sandpaper should I use on gelcoat?
Use the 1500 grit sandpaper with a dual action sander running the sander at a speed of 900 – 1100 Max. RPM. When sanding, use a 50% overlap with each pass of the sander. Remember to use a soft interface pad with the 1500 grit abrasive when sanding.
Are chipex kits any good?
Usually offers a far better finish than traditional touch up pens. Fast drying paint allows for a speedy process and ideal for an add on service. Complete system and process to follow is easy to access for beginners and the home user. Clear presentation and professional feel to the product.
Can buffing remove scratches?
FINISHING STEPS. Buffing an area with polishing or rubbing compounds removes scratches and blemishes, but they also remove wax.
How much does it cost to have scratches buffed out?
To get an idea, here are some approximate prices for buffing out a scratch: $150 for a surface scratch. $2,500 for a deep paint scratch. $3,500 for a full car scratch repair.
How do you fix large gelcoat damage?
2:236:04Boat Gelcoat Repair On Vertical Surface [MATERIALS LIST ] | BoatUSYouTubeStart of suggested clipEnd of suggested clipI might need to add just a little bit of extra tint just to take that down and make it a perfectMoreI might need to add just a little bit of extra tint just to take that down and make it a perfect match. I've catalyzed the gel coat and now using a foam brush.
How do you remove scratches from a boat hull?
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. Miro recommends starting out by dry-sanding with 180-grit sandpaper. When you begin to see the scratch disappear, bump up to 320 grit.
How do you fix gelcoat below waterline?
7:2712:09How to Fix a Hole in Your Boat DIY (Below the Waterline) - YouTubeYouTubeStart of suggested clipEnd of suggested clipAll right so with this thickened epoxy adhesive let's remove this mixing spout. And then pop the capMoreAll right so with this thickened epoxy adhesive let's remove this mixing spout. And then pop the cap. Off. And then tighten the mixing spout back on. And we are ready to fill the hole.
How do you remove scuff marks from gelcoat?
0:172:12How to remove scuff marks boat gel coat - YouTubeYouTubeStart of suggested clipEnd of suggested clipClean Magic Eraser.MoreClean Magic Eraser.
How to fix deep scratches on boat?
To fix gouges and deep scratches, you’ll need “chop” (powdered fiberglass) filler, gel coat and gel coat reducer. Jot down your boat’s model and serial numbers and contact the manufacturer to order gel coat (about $100 per qt.) to match your boat’s color.
What is the gel coat on a fiberglass boat?
All fiberglass boats have a thick structural core of fiberglass strands impregnated with polyester resin. But the part you actually see is the gel coat. That’s the thin layer of pigmented resin that gives the boat its sheen and color. Most light scratches are in the gel coat layer.
How to mix gel coat?
Mixing gel coat is a messy and stinky process—so wear chemical-resistant gloves, safety goggles and a respirator. Start with a small amount of gel coat and stir in the chop and hardener to make a putty that’s the consistency of peanut butter (Photo 3).
What is a repair pro?
A repair pro shows you how to make invisible fixes for scuffs, dents and scratches in fiberglass boats and other fiberglass items. You'll save a ton of money if you're patient and use the proper tools.
How long does it take for resin to harden?
Once you add the hardener, you’ve only got a 10- to 20-minute “open” time, so mix small batches and work on one gouge at a time. Thorough mixing is critical to proper curing. Spend a full minute stirring. If you don’t, you’ll end up with patches of sticky resin that can take days to harden.
Where are light scratches in a car?
Most light scratches are in the gel coat layer. They can be sanded out and the area built back up with new gel coat. But if they penetrate the core, they need to be filled. You can tell that the scratch is into the core if you see fiberglass fibers (Photo 2).
Can you spray gel coat on fiberglass?
Spraying gel coat isn’t like spraying paint. It splatters on and has to be sanded and buffed to get to a smooth gloss. So don’t be disappointed that the finish isn’t paint-like right away during your fiberglass boat repair.
How to remove scratches from fiberglass?
For deeper damage that exposes fiberglass, you will need to do a little more work! Of course, start out by removing wax and grease from the area with acetone. Use a gouge to provide a uniform shape profile to the scratch. Wipe the area down with acetone again to remove dust.
What are the most common damage to fiberglass boats?
Scratches. Scratches are by far the most common damage to fiberglass boats. They can be caused by almost anything - branches on the riverbank to grocery carts in parking lots! Luckily, they are not serious problems. If they REALLY bother you, they can be repaired or minimized with ease.
How to get rid of a headache from gelcoat?
Start by removing the wax and grease from the area with acetone. Wet sand the area with 1000 grit wet/dry sandpaper. Use a pail of water and gently rub the area with wet sandpaper.
How to get rid of scratches on Miro?
Miro recommends starting out by dry-sanding with 180-grit sandpaper. When you begin to see the scratch disappear, bump up to 320 grit. When 90 percent of the scratch is gone, move up to 400 or 600 grit and begin wet-sanding, working your way up to 1000-grit. When you use 400 grit or higher, be sure to wet sand.
When sanding a boat, do you sand in an X pattern?
When you sand, wet or dry, be sure you sand in an X pattern, not in a circular motion like would if you were waxing. This keeps the sanded area flat so you don’t end up with “divot” in your hullside or deck. When the scratch is gone, or at least removed to your satisfaction, it’s time to buff.
Can you sand a 400 grit sandpaper?
When you use 400 grit or higher, be sure to wet sand. Always keep the sandpaper clean with nice fresh water and be cautious not to remove too much gelcoat. It is possible to sand through the color. Believe it or not, 1000-grit has more cutting power than 180.
Can you use gelcoat on a used boat?
Used boats often have scratched gelcoat. If you’ve been shopping used boats for any length of time, you probably knew that already. The good news is that you can use that as a negotiating tool. On the other hand, if you’re the seller, you stand a better chance of keeping your asking price up if your boat shines.
Can you remove gelcoat scratches on a boat?
Either way, a boat does better in the marketplace if its blemishes are fixed. If the gelcoat scratches aren’t too deep, you may be able to eliminate them with a combination of wet-sanding and compounding. 3M makes a variety of products used by the pros. If the scratches are deep, you’ll need to know where to get the right gelcoat for your boat.
