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Another caution is you don't know what kind of soap they are using. I've historically had 2-3 layers of polymer sealant on my cars. Last winter I would touchless wash my car at least once a month. By the spring, there was no sealant left. I'm going to give a foamer a try so at least I know what soap and what water are touching my car.
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2019 M2 Comp, MT, BSM
2015 X5 Msport, CB (Hers)
2014 M235i MT, BSM, MPE, Dinan Springs (Sold)
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