Poorboys Spray and Rinse Wheel Cleaner is an aggressive citrus cleaner that can remove brake dust with ease. The scent can be a little strong although pleasant so always use in a well ventilated area. This cleaner should be sprayed on to all four wheels making sure you completely cover the entire wheel, you should spray all four wheels before you start to rinse them off.This being an acidic cleaner it is not safe for all wheel finishes so should be used with caution, we would suggest testing an area first before completely covering your wheels.