Have you tried taking a clay bar to it? If it's that important to you it might be worth a try.
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-Chris

'13 Z34 Touring Sport | ARK GRiP CBE | Stillen G3 CAI | AAM HFC | UpRev | 20mm Z1 Spacers | StopTech Drilled/Slotted Rotors | StopTech SS Lines
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