RE: Rust-Oleum?
Sledge, I'm an old dope fiend. However, the fumes are a real pain, so I'm thinking seriously about Nelson water based for next time. People also seem to think Flecto Varathane is sufficiently fuel proof. It can be used to fuel proof some paints. Do a search and you'll find some interesting ideas that I won't try to tell you because I haven't tried them.
Clear Rustoleum seemed even less fuel proof than the colored, so you can't spray it on top and expect it to improve anything. But who knows? The paint doesn't say what it is, and they probably vary the formula. That may account for why it's worked for some and not others. Good luck. I'd check out Nelson. Jim