Never used it before but with a fairly clean car to start, I used the Mequiers Clay Kit from Walmart. Followed directions by working a piece of clay flat to fit my palm, used the Meq Spray, and rubbed the clay lightly over the car surface, drying each section with a micro. No hand pressure, just slide it light and easy over a given section. Came out slicker than goose poop. Prob took less than an hour. Now the MB silver really shines. Missed a few places, like top edge of hood that I need to go back and get.