Thread: brakes?
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Old 01-06-2017, 01:22 PM   #9
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Join Date: Jan 2014
Location: Albuquerque, NM, USA
Posts: 649
The gray coating is there mostly to prevent new rotors from rusting in the box.

There is no need to clean it off the braking surface during installation, as the pads will do that nicely.
Kent Christensen
2001 Boxster
2007 GL320 CDI
3 BMW motorcycles
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