I just clayed my wife's Accord yesterday. If the clay was to pick up all the wax that was on that car then I think I would have started to notice it on my clay. I have my doubts about it being able to remove all wax. I didn't do a Dawn wash on it because I was just going to start out with a base coat of Klasse anyway. Klasse will definatly take off all the wax and the layer of Platinum underneath it. If you don't have any Klasse and you just want to make sure that all the wax comes off, then wash your car with Dawn dishwashing liquid. It will break down the waxes and sealants on your car in short order. Its a safe procedure as long as you don't do it 3 times a month or something. 3 or 4 times a year isn't going to hurt your car at all.