Thread: cquartz finest
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      01-16-2014, 11:50 AM   #3
Z K
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Drives: E90 M3, G20 M340i
Join Date: Jul 2011
Location: San Francisco

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Your problem is the touchless car wash. They use high pressure water and strong detergents to clean the car. Water can scratch the surface if there is enough pressure applied.

Also, automatic car washes do not thoroughly clean the car. There are many places that it does not clean and stay dirty. Wiping with a microfiber afterwards is asking for trouble as you drag the dirt across the paint. I would definitely avoid wiping after using a automatic car wash.
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