I used the VHT flameproof 2000 degree ceramic paint on my wife's pipes. It didn't really hold as well as I wanted. Also the curing process totally sucked and almost ruined my grill...we had a grill fire trying to cure them.
The other curing option is to idle cure them. Idling my bike for 20 minutes 3 times isn't how I like to treat my bike.
The other problem is the mess. With most spray paints you can sweep up the dust pretty easy. With this ceramic stuff its almost impossible to sweep up and gets everywhere. You'll want a really good safety mask for painting with this stuff.
Especially since the Owner's Manual states "Do not allow the engine to idle too long.", which sucks that they phrased it that way since "too long" is not an extact unit of measurement.
Cripes it might be hot enough in Phoenix to just set them on your sidewalk.
If I recall correctly Mine needed to be heated in cycles at 200deg, 400deg, 600deg. My grill handled it but I also had a massive grill fire. Actually melted part of the cast grill. Flames were a good 4 feet high.
LESSON: IF YOU USE YOUR GRILL TO CURE YOUR PIPES MAKE SURE YOU REMOVE OR CLEAN YOUR GREASE TRAP.