Ed is for the most part correct. Just about any 2 part urethane SINGLE STAGE paint is fuel proof. I work in the automotive refinish field and very often have to deal with possible scenarios involving chemicals that are much more corrosive than glow fuel. The only exception I take with Ed is that acrylic enamel, without a hardener, is extremely durable. Enamels cure by oxidation; the more time that passes, the stronger they become. They belong to the chemical family of thermoset - cannot readily be softened with either heat or solvent. The addition of a catalyst to an enamel paint is not so much for strength ( in regular automotive use ) but to get the paint film out of it's sensitve recoat window faster and the car back into the customers hands faster. Automotive enamels are slow to cure, the addition of a hardener kick starts the reaction. There are different types of catalysts that can be added to enamels depending on what you need the final product to be capable of doing. In the end though, after about a month of cure time enamels with or without the addition of a catalyst will react about the same. Both give excellent durability. Enamel that is custom matched and put into a spray can generally works fine. But as stated previous, test -test -test, all enamels are not created equal. It is expensive though as also already said to have that convienience.

Dan