Join Date: Dec 2011
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I personally don't use them, but I will sometimes use the ones with the pressure washers to get the undercarriage clean after driving on the beach. Some, not all, but some use harsher chemicals that strip your wax off. It's a gamble without knowing what kind of soaps they use, but the ones by my house buy 55 gal. drums of a harsh, non-ph balanced cleaner from a local distributor that I use for misc. stuff. So I only use the pressure washers.
I guess it boils down to, I'd rather use the touch less wash than let bird crap etch my paint.