I mask off the vehicle where appropriate, AFTER I clean it and tackcloth it, then I primer it, let that dry then I rattle can it with rustoleum.
It'll look ok for a few years.
Rust will show back through it if you don't use POR-15.
I just painted half of my XJ for $9.00
3 cans of silver metallic rustoleum.
Did from the top line of the stripe down to rockers.
Looks better than it did.
Rust is starting to show through, just wanted to stop some of it before I can strip it, por-15 it and truck bed coat it in the spring.
Teron