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An often overlooked negative of automatic car washes, especially touch-less, is the of use industrial strength alkaline enhanced degreasing shampoo to remove dirt. This soap can eat away the clear coat over time, strip any wax or coatings and etch and discolor window trim moldings.
Most do-it-yourself car wash soaps tend to be pH neutral which is safe for your paint or coated paint.
Some examples of trim discoloration from regular car wash visits:
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2022 M550ix
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