I bought Instant Wheel Cleaner(Meguiar's Gold Class) today. I decided not to use it after reading the directions, stating that it should only be used on "Uncoated polished aluminium wheels". I know the wheels on my 530 are not polished aluminium wheels so I would like to ask this forum if anyone has used this product and if they are happy with it. Also are there any products better than this or some other way to keep wheels clean on regular basis! Thanks.