autobrite or autorae snwofoam is good, what are you using the foam in? if its a superspray u may aswell drink the foam and piss on the car!! lol , if its a lance then anything will do, snowfoam is dilutable aswell, snowfoam works best when it is spread well e.g gilmour/lance when i used it in the superspray it didnt really do anything apart from wet the paint and very lightly loosen stuff up,