Visit Meguiars' website for a lot of good information. Here is the link -
http://www.meguiars.com/index.cfm
I use Meguiars' three stage Deep Crystal System (1. System paint cleaner 2. System polish 3. System Carnauba wax). I use a clay bay after I apply the paint cleaner if I find a spot where clay is needed.
Meguairs three stage system really works great with the paint on my XFire.
Good luck in working with your car's paint.