here is 1 for you when wheels are really bad i use astonish oven cleaner it doesnt do any damage to the wheels you dont even need to use gloves as it doesnt do your hands any harm at all i have been using it for years put some on a cloth and rub it onto the wheels then rinse it off. and a tub only costs £1 and does for ages then a coat of furniture polish on top to stop brake dust from sticking