Saw these weird black marks on my front driver's side rotor yesterday. They are about evenly spaced and go all the way around. This is the only one of my rotors that are like this, the other 3 are perfectly fine. Anyone know what they are and how I can get rid of them?
The brakes work perfectly fine, no vibrations or anything. The marks wouldn't wash off when I washed my wheels yesterday. I was thinking they might be pad deposits, but I wasn't sure. I'm running Carbotech XP8 pads all around.
