I'm asking this because I either want to do a brushed aluminum look or go with clear coat rust(too broke for paint). Thanks!

 

body parts yes.bumpers no.
if you spray those with regular paint the paint will tend to crack as it doesn't have a flexing agent in it.
If you are doing a "poor boy spray bomb" paint job look at getting colors that match in KRYLON.Use the plastic paint for the bumpers.

..interesting thread called: Plasti-dipped my FC...Look at that..It could sway you to do that!That stuff comes in a multitude of colors.

 

Don't do a brushed steel paint job in Seattle, lol. Rust city. If anything Buy or rent a small compressor and spray it with Rustoleum paint.

 

I plasti-dipped my fc matte black and it looks great and is cheap they just came out with a very nice polished aluminum dip that looks amazing if that's what ur looking for