What are you looking to do with it, just spread wax or remove defects? I can't imagine removing defects with one of those things, and it seems like more trouble than it's worth for just spreading wax. I've only worked on one car where I thought it might have come in handy, and that was for getting into the air intake cutouts on the upper rear quarters of a Ferrari 360 Modena - I couldn't get a real buffer in there.