i gave mine a sponge down yesterday, fronts were clean but the insides were filthy, although all i did was just use the general combined wash/wax that i use to wash the car with, didnt go to the effort of waxing/polishing em or nowt or using any dedicated wheel cleaner (looked at some but couldnt be farked), but they pretty much came out lovely, not a mark on em anywhere, which was surprising considering the price. chuffed to bits i am, shame about the marks on yours, you sure its not something else? maybe the laquer was a bit marked anyway (may be something under the laquer)?? the pic the guy put on the forum of em must've been the worse one because it was quite scratched on the spokes etc, but didnt look so bad as to allow water etc under the laquer.