SONAX Wheel Cleaner full effect is engineered specifically for wheels that accumulate high amounts of iron-rich brake dust, oil, rubber residue as well as other road dirt and grime. This SONAX signature product changes colors from bright green to deep red as it interacts with material deposits, loosening it from the wheel. This formulation is also effective and safe for use on painted wheels, it will not deteriorate clear coats or damage corroded wheel bolts.