It would be easy to get taken if you aren't watching to make sure they wax it twice. I think one good coat should be sufficient, if you have some issues with your paint then maybe you should pay to have it buffed first and then hand waxed. Either way I use whatever Meguires is the the most expensive at the auto parts store when I go to buy wax. Usually a premium carnuba wax. I also apply it in sections and wipe it off before it dries, I dont know why but I was told by a detailer once not to let wax dry on your paint first. That was back when I was taking my 69 GTO to car shows all over. Maybe someone else will have some input on the drying factor?