Repair Kits: Fixing Dings

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Keep it in a cool, dry place out of direct sunlight, like your garage or a closet. Sunlight can prematurely cure those UV resins right in the bottle! Your car’s glovebox or trunk gets way too hot and will ruin the chemicals. A small toolbox or a dedicated bucket under your house works perfect. Just make sure the lids are on tight. The goal is to have it ready to grab when you come in from a session with a fresh ding.

First, you gotta let the board dry out completely, which can take a few days. Then, grab some coarse-grit sandpaper and rough up the area around the ding, making sure to feather the edges of the existing glass. Clean out any loose foam or old resin. Wipe it down with acetone to get rid of all wax, oil, and dust—this is crucial for the new resin to stick. A clean, dry, and rough surface is key. If you skip this, your patch will just pop right off after a few waves.

Patience and sanding, bro! After your repair cures, start with a coarser grit (like 80) to knock down the big bumps. Then work your way through finer grits—120, 220, 320. Always sand wet to keep the dust down and the paper from clogging. The final polish is key. For that pro, glassy finish, use a very fine grit like 600 or even 1000. Take your time with each step. Rushing the sanding is what leaves your board feeling like a cheese grater.

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A simple hot coat is for small pressure dings or surface scratches where the fiberglass isn’t broken. You just mix some resin, fill the dent, and let it cure. A full glass job is for real punctures. You lay a piece of fiberglass cloth over the hole, saturate it with resin (lamination), let it cure, sand it, and then add a hot coat on top to seal it smooth. The cloth adds the structural strength back. So, no cloth for cosmetic stuff, always cloth for holes.

This totally depends on your resin. Quick sun-cure stuff can be ready to sand in 20 minutes if it’s bright out. For standard polyester resin (the stuff that comes with a tube of hardener), give it at least 12-24 hours to fully harden before sanding and hitting the water. Epoxy resin often needs a full 24 hours or more. Don’t rush it! If it’s still tacky or soft, it’s not ready. A premature paddle-out can ruin your repair and let the ocean in.

For a solid field repair, you need a “sun-cure” or “UV” resin kit. These are perfect because they cure quickly in sunlight, no mixing required. Grab a small piece of sandpaper to rough up the area, some squeegee or an old gift card to spread the resin, and a razor blade to trim the excess once it’s set. Toss it all in an old wax tub. This lets you seal the ding temporarily to keep the water out until you can do a more permanent, laminated repair later.