Clear-cote
I just painted a plane with Auto-Zone..."Dupli-color" engine enamel....reason ? heat resistance, and gas-oil resistance.
I also used their "filler" primer.
I covered it with their "enamel-clearcoat".
Cost...I think it was $3.59 a can...about half the cost of "air-plane paint".
Result....?....I wont be using anything else...ever.