Stjarnagloss Hjul - Colour Change Wheel Cleaner 5 LitreNot just an iron remover Hjuls a genuine all round wheel cleaner. You may have seen colour change wheel cleaners before, but ours is different. Its a thicker recipe for a bit more dwell time and contains soap to remove general road grime, as well as the active ingredient that removes ferrous brake debris. But it also has some solvent content to soften tar spots those little black dots that often pretend to be stubborn brake dust deposits. Its pH