I bought a used Lincoln, that sat on a gravel driveway. It was parked for weeks and the front rotors had some surface rust. The area behind the pads stayed clean. Driving/braking, cleaned off the rust and a slight pulsing developed. It had nothing to do with heat. They are not 'warped', they are just worn ruff. I was told 'better' rotors have more carbon in the steel and don't rust as easy. No one 'turns' anymore because the thin rotors warp. You have to drive like some kind of *******, to get brakes hot enough to warp. Even towing, your trailer brakes should be doing there part and not heat up the trucks. Certain wheel designs, expose the rotors weather. My 2000's has smaller wheel openings and never had a problem.
Last edited: