Shake well before using. Ensure the vehicle surface is cool to the touch. After the vehicle has been washed and dried, spray Iron Remover liberally onto the vehicle, one panel at a time. Let Iron Remover to dwell for about 5 minutes, allowing the fluid to turn completely purple as it activates. Rinse off with a hose or pressure washer, and do not allow the product to dry on the surface of the vehicle.