BFG MAX is a stronger, more powerful and more effective version of our BFG acid free rim cleaner. Its power & effectiveness closely resembles that of pure acid. Fast acting acid free chrome and mag wheel cleaner removes brake and traffic film. For best results, remove all heavy soil deposits with an all purpose degreaser or cleaner before using. Rinse and dry completely. Spray directly on the wheel surfaces to be cleaned and allow to work for up to a maximum of two minutes. For stubborn dirt, agitation with a brush will improve cleaning efficiency. Rinse the wheel and surrounding areas thoroughly with a pressurized cold water spray. Reapply as necessary. This product will etch glass. Protect all glass surfaces before applying the chemical.