Bondo 32-fl oz Color-changing, Heavy Duty, Waterproof Interior/Exterior Brown Fiberglass Resin Repair in the Patching & Spackling Compound department at Lowes.com
DIY Plastic Molds for Fiberglass and Resin Casting - FeltMagnet
Amazon.com: Epoxy Resin Color Pigment (Dye) Popular Colors Kit Black, Blue, Red, White, and Brown Liquid for Improved Mixing, Woodwork, Countertops, Floors, 6cc Each