i did a technical project for my last year of engineering on brake rotor design. i learned that that calculating rotor stresses is easy, but calculating thermal cycles is very very difficult. geometrey, convection coefficents, conduction rates, forced vs free convection, specific heats, and transient thermal load inputs all have to be considered.
my application was a 750 lb open-wheeled racecar, with alumimum rotors, anodized. we measured temps after some hard autocross testing, and got 280-300 degF. 350 was the design limit.
for a 'heavy' C3, will grey cast iron rotors, braking from highway speed, i would estimate ~400 degF. stop and go city driving? ~200-300 degF
any paint from VHT should work.
[Modified by Turbo-Jet, 2:07 AM 7/10/2002]
[Modified by Turbo-Jet, 2:08 AM 7/10/2002]