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Old 10-28-2012, 10:08 PM   #5
Registered User
Join Date: Jan 2011
Location: San Diego
Posts: 2,928
My Ride: '12 135i Dinan S2
I did some research and discovered vinegar and water works to remove hard water stains. I laid a towel soaked with 50/50 water/vinegar on the problem area for 7 minutes to let it fully penetrate. Afterwords, I dried the area and hit it with scratch x two more times. No more spots. After that I threw 2 coats of P21S hard wax over the whole area and it looks great.

Past: 1999 Techno Violet Metallic M3
Present: 2012 135i DCT Dinan S2
tock172 is offline   Reply With Quote