How many cans to do whole body?

Dont laugh. I have a small comp and airbrush. There are two coats on our bus. The origonal which is showing through where it has not been sanded and a bad coat on top. Oil will stain it in places where it is badly done. If I sand it back and use one coat of cheapish paint will it look ok and last 2 years? I have very little budget and little experience. Could I do the whole thing in cans over a period or am I mad?

Ta

Philip

It's doable but will still look shitty if you don't do some prep first.

Better to buy a $50 Arlec electric sprayer, some real paint and give that a go.