Bondo Fiberglass Resin 0.74-fl oz Color-changing, Heavy Duty, Waterproof Interior/Exterior Clear Hardener in the Patching & Spackling Compound department at Lowes.com
3M Home Solutions 1 gal. All-Purpose Fiberglass Resin 20124 - The Home Depot
HOW MUCH POLY OR EPOXY RESIN DOES YOUR FIBERGLASS LAYUP NEED? - YouTube