Personally, I would use Dupli-Color engine enamel. The one with ceramic in it. Dries fast and is definitely fuel proof after a couple of days. You could also use their primer/surfacer to fill the grain of the wood. Do several coats, sanding between each one, then shoot it with the enamel. Clear coat is available too, but not necessary. The enamel will buff to a really nice gloss without it. If you shoot a careful wet coat, you won't even need to buff. I recently used these products to do a custom paint job on my brother's motorcycle gas tank, side covers, etc., and was really pleased with them.

AV8TOR