I just used mine today. It amazes me every time I use it. You can run your fingers on the car afterwards and it will feel like you're running your fingers on the windows. It's almost as if you just put a fresh clearcoat on the car. That is, after you polish and wax it. I just fill a bucket of warm water with concentrated car wash and dip the bar inside when necessary. There will definitely be a noticable difference. There are different grits out there, so try to find the fine grades.
Just try not to get any of the clay on the rubber areas or the area around the bottom portion of the car. It may be difficult to get off.
