OK I've read the previous posts, but would still like to pose the question. I've just got my hands on a previously abused by wonderous Brompton Folding bike. It was harshly spraypainted black by some fool. I'm sanded it down so I can see the original blue. I don't have much money, a good garage, or access to many types of paint - just whatever I find at the HEMA (typical big department store). Some say use spray paint... but I don't want to spraypaint and watch it slowly peel off. And I carry the frame alot, I dont want my hands turning blue.

Whats the best formula in relation to very little supplies or skill?

Clearcoat... I just dont think I can find that. Maybe the fancy bikeshop.