I've had my best luck just painting with whatever color I wanted, and then clear coating with Clear Finishing Epoxy. Some finishing epoxies are amber in color and will tint the color, so I just use the clear epoxies. They provide a very high gloss, durable, fuel proof finish, can be applied with rubber gloves on your hands, and will flow out nicely and fill any imperfections. No nasty paint fumes to worry about, so I can apply them in my basement.

Brad