Not all enamels are fuelproof, epoxy paint (two part) are fuelproof, but you will not find them in a can, ACE hardwares have a spray can epoxy (their own brand name) that is fuelproof though, and sprays very well and gives an incredibly good finish (for a spray canned paint). You have to be careful with spray canned paint, always test if not sure, Rustoleum is fuelproof, except for their silver and clear.
Some spray paints in a can are said to be epoxy, maybe they are, maybe they are not, any chemists out there?