Wash vehicle first to prep the surface. After washing, make sure surface is cool. Shake bottle well. Spray directly onto the surface. Using a damp sponge or microfiber towel, spread the solution across the area(s) you're working on. Wait 4-5 minutes after applying. You will notice the Iron Remover changing colors to a deep purple/red as it works to remove metallic contaminants. Wipe off using a clean damp sponge or microfiber towel. Rinse off using clean water. The vehicle is now ready for additional detailing i.e. claying