I have used the POR fuel tank repair liquid. It lasted at least 2 years till I sold the car. I do not know about the heat paint, but I was thinking of using their bright white epoxy stuff for my bath tub, retail store stuff sure didnt last. Have any E-23 fans used the POR-15 products? Iwant to paint my exhaust manifold and I have received advertisements from this company. I wanted to get in put and suggestions from board before I make my purchase.