Yes, use Krylon Rust Tough spray paint. You can also use the Krylon Interior/Exterior paint, but the Rust Tough is better and more durable.
I used Semi-Flat, but you can use flat or Semi flat, up to you. Anything with a gloss is never going to sit flat and its going to LOOK like a rattle can job. If you use Krylon and do it with a flat or Semi-Flat color it'll look like a real paintjob.
I painted my entire engine bay, denferwells, and the front fram of my car with the Krylon semi-flat. It looks perfect. It lays down so flat and dries perfectly. Just make sure to buy a LOT of cans and coat the shit out of it.
And again, I can't stress it enough: Use Krylon. I've painted more than I care to talk about with rattle cans and Krylon is the best. Its worth the little bit extra you pay for each can.
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