B bmwgeek New member Joined Nov 13, 2010 Messages 185 Reaction score 0 Mar 2, 2013 #21 I like p21s polishing soap. It's low priced, has a sponge, and doesn't turn black. Optimum separates as somebody said above and residue turns black but it works and it leaves some sort of sealant protection behind.
I like p21s polishing soap. It's low priced, has a sponge, and doesn't turn black. Optimum separates as somebody said above and residue turns black but it works and it leaves some sort of sealant protection behind.