Some guy was washing his '87 Porsche 944 with dish soap today to "strip the wax" off it while I was doing a quick-and-dirty two-bucket (one soap, one rinse) wash with Meg's Gold Class on my Buick. The car was in immaculate condition, and was very clean. So he clearly cares about it. I've always heard you're not supposed to use dish soap because it is bad for the paint, namely stripping old wax off and possibly harming the clearcoat. But if the purpose is to strip wax, then I can sorta see using it... My question is: Does dish soap have a legitimate use when you want a clean slate to wax on?