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      12-16-2011, 07:10 PM   #3
MKE_M3
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Drives: 2011 e90 M3
Join Date: Feb 2009
Location: Milwaukee, WI

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I believe the fender is plastic, so you shouldn't need to worry about rust. No matter what you do to protect you'll have issues as the wheels will always kick up stones and what not.
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