"IMHO, the best way is automotive type multistage painting, using a good compatible clear-coat for a HARD shiny fuel-proof finish."
The only drawback with multi stage paints as in basecoat/clearcoat is that alot of your bases are not fuel proof. Even though you shoot a fuel proof clear over top all it takes is a scratch in the clear that makes it thru to the base & you can have paint separation from fuel exposure. I've seen this enough times that even when I shoot scale boats I'll have single stage colors mixed custom for what I need & then shoot the clear after the application of decals. If you have the choice when picking your colors go with a paint grade that will give you a fuel resistant finish without the clear. Plus if you're not using any decals or graphics then you don't even have to fool with the clear at all. I've had very good results with PPG Concept series. B)