Quote:
Originally Posted by CSG Mike
Looks like surface rust. Also looks like the pads are not perfectly mated to the rotor surface, since one is new and the other is not.
Just keep driving and they'll eventually mate themselves.
-Mike
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I drove the car home, walked inside and changed clothes, and then took the wheels off. I've never seen surface rust develop so fast. The back rotors (OEM) are fine.
The pads not mated to the surface of the rotors yet accelerates surface rust? Sorry if this is pretty basic. Road america in a week and a half and in a scramble to get everything done in time.