Hey their she_so,
Here is a write up I did a while back on this subject. It is probably a little over thorough but is a very complete explanation of how to pull off a professional looking paint job, and covers everything in detail so you should be able to pick up the basics, and see where you go from their. Just as Charon already said, prep is a huge part of pulling off good results! Here is the Link.
Guide to Spray Paint your Center Dash Bezel
Go easy, best of luck on your project if you go ahead with it. and also if you do, please post some pic's to show off your hard work!
Candyman