Monokote on Monokote
Stew99 is right on about the trim solvent. The bleeding thing only happens with certain colors I think, but can be a huge pain in the butt. I had one plane I thought I'd never get cleaned up, because the more you clean the more it bleeds.
The air bubbles are a problem as well, and one thing about trim solvent: you only get one chance.
Still, it is very fast compared to the other methods, and a few little bubbles don't bother me.
If you go with trim solvent, get a huge fan to blow fresh air your way!