Burnishing in the brakes is the proper term.
Tom
Tom
Cheaper rotors are thinner, therefore will warp easier.
In fact every case of "warped brake disc" that I have investigated, whether on a racing car or a street car, has turned out to be friction pad material transferred unevenly to the surface of the disc. This uneven deposition results in thickness variation (TV) or run-out due to hot spotting that occurred at elevated temperatures.
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