I actively searched for the best way to patch small holes in fiberglass on the web, and couldn't quite find concise answers - this lead to a more dedicated search. I ended up talking to surfers, sailors, and prop-masters about how they make repairs to structual fiberglass and came up with the following methodology.
Hope this is helpful, and I would love to hear back from the community on this.
Step 1: Materials and Tools
I got a bulk of my materials from Douglas and Sturgess in Richmond, CA - the folks at the store were incredibly helpful and super nice! THANK YOU!
- Fiberglass Chopped Strand/Random Weave Mat
- Fiberglass Flake
- Bonding Resin
- Resin Catalyst
- Magic Sculpt Polyester Puddy Resin/Hardener kit (for backfill of the gelcoat on the exterior of the hull)
- Mineral Spirits for cleaning excess
- Mixing Container (Be sure to get one with the volume measurements on the side of the container for easy mixing)
- Small Disposable Paintbrush
- Angle Grinder with Grinding Disc
- Orbital Sander with 80 Grit Disc
- Stir Sticks
- Safety Glasses
- Permanent Marker
- Duct Tape