give up on it. looks great when you clean it but as soon as it dries it goes back to looking crap. the glue that holds the tiny bits of rubber together discolours after a few months of it being laid and you can never get it back. if it's the same surface that i have seen i have tried everything under the sun to clean it with no success, if you really want to have a go, do a small area without charging, that will go down better in the customers eyes than him thinking he is going to get a top job and her doesn't,
colin