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Old 12-10-2004, 11:47 PM
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E300D E300D is offline
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Join Date: Apr 2004
Location: USA
Posts: 404
What do you mean by cosmoline? The primer like paint on the rotor surface? If so then I would do anything about it. I bought MB rotors from dealer with the primer like paint on the rotors and the paint wore off the rotors very quickly after some braking. The car was a 95 W124.
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