[fastfredracing]

I find the whole " rotors do not warp, its just pad material deposits " theory interesting .
As someone who has turned thousands of rotors in my life, I will wholeheartedly say, that rotors do indeed warp.
You can literally see the run out when you chock them up on the brake lathe, and bring the cutting bits close to the rotor surface .
I don't cut rotors anymore, but when I did, it was pretty rare for rotors to clean up without taking at least 5 thousandths off each side . It was not pad material I was removing, it was metal .