 McGuire's Ultimate All-Wheel Cleaner delivers powerful cleaning, yet is gentle enough for all wheel finishes. Advanced chemistry attacks road grime and dissolves brake dust for a deep, thorough clean. The thick, high-clean gel turns brake dust purple and road grime brown as it powers through stubborn contaminants. And since it's acid-free and pH balance, it's safe and effective for all wheel finishes. McGuire's Ultimate All-Wheel Cleaner. Keep the guesswork out of cleaning your wheels.