techline sells a thermal barrier do it yourself ceramic coating in 3 oz bottles for $30 each. how much do you think it would take to adequately coat all 3 faces of 2 12A rotors?

edit: the coating is water based and can be cured in a normal oven

 

http://www.techlinecoatings.com/Engine.htm

 

awesome

 

I think you need to call them and get an estimate of sq in of coverage per bottle or per oz. Then you can calculate what you'll need.

 

I'll second what Carl said.