ARMOR ALL® Ultra Wheel Cleaning Foam with Colour Transforming Technology works by spraying on blue and turning white when it’s done loosening brake dust and dirt. The active cleaning formula attacks stubborn brake dust and soil and is safe for factory wheels*. * When used as directed DIRECTIONS FOR USE:Ensure wheels are cool and dry to touch. 1. Shake can well. Hold can at least 15 – 20cms from wheels and spray 2. When most of the foam turns from blue to white, roughly between 30 – 60 seconds, scrub soil using a wheel brush or sponge. Do not allow product to dry on wheel surface 3. Thoroughly rinse using a strong stream of water, ensuring product is fully removed 4. Dry wheel with a soft cloth to prevent water spotting For best results: A second application may be required with the use of a wheel brush or sponge for heavy dirt and baked on brake dust build up.