Clean it really good and remove all figure prints, oil, shipping marks, etc.
Prim with a few light coats of primer.
Paint with several LIGHT coats of paint.
Remember: Spray paint works best with lots of light coats of paint sprayed in 20 to 30 minute intervals. Heavy coats will flake off and show drip marks.
2013 JKU Rubi, Minor Mods: Sheldon
1974 CJ-6, 1-tons, 40's, 401 V-8, TH400, and lots of stuff: Panthro