you guys have so much patience, I cleaned mine with wheely clean, alloy wheel cleaner, I didn't remove the bungs, they came up brighter though. I've got the attention span of a 4 year old when it comes to cleaning my car.My boss asked me if we had a hosepipe ban on still in Manchester, I said no ? He then said that looking at my van he thought we were unable to wash them. Cheeky bugger !!!