THere it is on one of my old shoeboxes, sprayed OK, was cheap, held up on another car I sprayed with it as well. Would use again. If you really want a cheap finish, maybe Rustoleum? Like this... Looked really nice, Merc was just really dirty in the pic.
It's lacquer primer, doesn't hold up all that well to the elements and doesn't protect the metal much either. It can also cause problems for a real paintjob down the road. The solvents in the paint can reactivate the primer and cause alot of problems. One of the first mistakes I made doing body & paint was using this stuff just becuase it was cheap!