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      10-13-2012, 12:34 PM   #2
rjd598
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Drives: E90 M3/ F30 328i
Join Date: Jan 2009
Location: San Diego,CA

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2016 BMW 328i  [0.00]
2010 BMW M3  [4.50]
do you have any type of protection on the car? like a wax or sealant? sounds like that will fix your problem but not entirely fix it. the rear will always get dirty after a wash the fastest out of all the parts on the car. it's just how it is but when you have some type of protection there will be less contamination and it will easier to wash off
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