P&S Brake Buster is a wheel cleaner that is easy to use, effective, and most importantly, it's very safe. Brake Buster is not an acid-based wheel cleaner, so while you will have to use manual agitation to remove brake dust in some cases, you won't have to worry about damaging your wheels finish with this product. In addition to this, it also contains a rust inhibitor that helps prevent your rotors from rusting during the wash process.