Mate the dirt that came off my civic using the clay is unreal! The lower half of the car must have been covered in tar which was so fine it couldn't really be seen, you could certainly tell the parts that were cleaner than others, it goes from being quite rough when you start claying it to smoothing out nicely. Just wash, clayed, lime juiced and black holed my civic, gotta go out now but I will wax it later with the Dodo SN. I suppose this is more of a trial of the products and if I had more time I would have machine polished the civic and got some 2000 on some of the scratches. So far given the time and tools available I am very happy with the finish, that Poorboy's black hole is truly amazing stuff!