I'd try to get ahold of someone else's spray gun. Unless you have become seriously baller you'll waste a lot of money that could be spent better elsewhere if you buy a good spray gun. And you do need a GOOD spray gun and a GOOD compressor that can maintain a constant PSI.

The primer is child's play. Make sure its clean and gob on as much of taht shit as you need/want. You'll just sand it down later. But the base and clear are where you'll really need a good gun and good constant pressure. Oh yeah, also, throw down water under where you're spraying. It'll help trap overspray and keep it from getting everywhere....and it WILL get everywhere...into every crack in anything.