Haven't tried it yet but im holding high expectations looking at genuine before and after pics people have posted onto the internet.Some of them have been done with minimal effort with average wash, others people have used it with wash mit and pulled off some stunning clean pictures.

Apparently it's not a good idea to do it when the cars wet because the water creates a sealant against the dirt better to do it on a completely dry car where the foam/suds can apply onto the dirt.

The basic principle is it lifts dirt and particles away from the paint work if left wet you can merely use a hose pipe, pressure washer, bucket of water and wash off all the loosened dirt and grit, better results come from the rpessure washer so i've been told.

So when you do a shampoo wash using a sponge or wash mit your not picking up dirt and putting it back into the bucket your washing with thebn onto the paint, making the whole cleaning process quicker and more effecient.