I use Griot's Best Of Show wax after I power clay the rig.
Both are used with a Porter Cable random orbital sander.
Been using that system for many years.
Can not burn your paint with it, and it leaves no swirls marks.
Here is a page I put together several years ago.
http://pnw4runners.com/tando/wax/wax.htm
On the interior I am now using Griot's Interior Cleaner instead of the Tuff Stuff spray I mention on my detail page.
Good stuff, no shiny crap residue like Armorall would leave.
For the outside plastic I use use the same carwash soap as for the paint, Griot's carwash.
Their homie is
www.griotsgarage.com
I have washed the rig about 4 times since I bought it, and the last 3 times was with the Griot's carwash soap.
I have been washing, waxing, detaling rigs since the late 60s, and the Griot's stuff is the best stuff I have ever come across.
And here is a tip:
If you get wax residue on the plastic and it shows on it, use peanut butter to get the wax residue off.
Be aware this might attract critters though, and they might start tounging your rig.