Always test on an inconspicuous area before proceeding. 1. Spray wheels when car is dry. Best to leave car to cool down and ensure you do not miss any smaller curves on the wheel's design. 2. Let Purple dwell and dissolve the brake dust. When you see the purple bleeding, this is when you know it is time to rinse. 3. Rinse thoroughly ensuring all product is rinsed off 4. Check wheels, follow with light scrubbing if needed. 5. Dry wheels and proceed to use Tire Shine.