SOME Krylon and Rustoleum paints are fuel proof, unfortunately I do not know which ones. If you are using either of them, either do test panels first or plan on clear coating them.

FWIW - Dupli-Color Truck & Van paints are labeled on the back. If they say ACRYLIC they are fuel proof. Just be careful with compatibility. You can put enamel over lacquer, but not the other way around. They cost about $4 at Wal-Mart for an 11 oz spray can. The small cans are not labeled as to whether or not they are acrylic.