How to Fiberglass: Fixing a Cracked Kiteboard

Step 10 Check for Smoothness

Use the edge of something straight to check and see how smooth and level your work is. Hopefully the four layers of fiberglass that you laid down should be only very slightly raised above the rest of the project surface and should create an almost imperceivable bump in the area that got repaired. If there is more a bump or raised section, then you either put down too much resin, laid down too many layer of fiberglass, or didn't sand your work in between coats sufficiently.

I was surprised at how thin the repair was. Even after laying down four layers of fiberglass and 5-6 layers of resin it was still just a tiny bit higher then the surface of the original kite board.

The final product wasn't visually very impressive since the original decal was sanded off and replaced with just a big old swatch of tan epoxy, but the crack was perfectly mended and the board is likely to be significantly stronger then it was when it was originally made in the factory.