Rustoleum is fuel proof in red, black, white, yellow up to 15%, thats what I run. Grey is also but you MUST let it cure for at least a week preferably 2 before any fuel touches it. I use it on monocote, solartex, fiberglass, and abs with no troubles at all. Rustoleum yellow is pretty close to monocote yellow (read- not an exact match). But you wont notice the difference after a few years. I had a lot of trouble with lustercoat yellow and had to sand it all down and repainted with rustoleum yellow. Lustercoat had black spots in it. Took it back to the hobby shop and discovered all the cans of yellow had black spots. I've got planes with cowls that are around 8 years old. The paint isnt the problem on those cowls, just extreme usage.
Edwin