Any wax and grease remover will do, and they don't hurt rubber. I'm impressed with the new water based products as well. Valspar, House of Kolor, all the paint companies have both , I like U-POL brand water based myself, cheaper than paint company brands and good. The main thing with all of them is wipe on with one rag, wipe off immediately with another, otherwise you're just lifting dirt and moving it somewhere else.