Can anyone recommend a good alloy wheel cleaner. I've got an S-line A3 TDI with the 18" RS6 style alloys and they look great when clean. The outside surface is pretty easy to wipe down and the brake dust doesn't really stick, don't know if they have been coated with something or if they are just like that. The inside areas are much harder to sort out though and its difficult to get in there. Please tell me there is some spray on wash off wonder product out there. I always wondered how my old VW dealer used to get the alloys so clean on my old Golf GTI. They looked almost new after it had been in the garage.