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      04-17-2024, 06:37 PM   #8
M3SQRD
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Drives: E92 M3,G20 330ix,F22 240iX,F82
Join Date: Jun 2009
Location: Mid-Atlantic

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Quote:
Originally Posted by Redd View Post
These are definitely brand new. Used or even skimmed rotors don't have surface patterns like that.
Correct. I believe we’re all in agreement they are new. The question is what’s causing the surface staining - “oil”, incomplete/improper surface coating/treatment, etc? Will the surface staining wear off if installed with new pads or will you get an incomplete/inconsistent pad transfer layer? Would a cold race pad compound machine off the surface layer or …
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