Don't worry about the epoxy you purchase. They most likely buy their ingrediences from the same supplier. The problem with epoxy and the "amine blush" is in the user. Follow instructions, don't go on vacation when the glass is half covered. Put a seal coat on first, then lightly sand off all the bubbles, hair, fuzz, and "stuff" that comes out with the first coat. Get some good lights to work under. Have friends over to help with the first coat on the glass so you can correct their work as they correct yours. It's a piece of cake. Damn! all this talk got me excited...I wish I had a boat to cover right now..maybe I'll go take a cold shower.