BlueMetal

u mean rust on the rotor hats? just wait till next time u get ur brakes machined... ask the mechanic to go over the hats with a file (while they're spinning on the machine) to get rid of the rust... once thats done give 'em a spray or some rust-proofer or maybe even VHT rotor paint... leave to dry the coating will stop the hat rusting again, but only works if u get all the rust off or u could wait till u get a new set of rotors, and paint them up as above?