I've been stripping my car this week. So far the best combination is chemical stripper and a scraper to get most of the thick paint off and then a 5 inch Clean and Strip XT disc on an angle grinder to get the rest. I then go over it with 180 on a DA for epoxy primer. The 3M Clean and Strip XT discs aren't cheap and wear out pretty quick but then there is no cheap way to strip your car.