Using these vinyl overlays is a piece of cake. First, make sure the fender vent area is clean and dry. Then, carefully peel the backing off the vinyl overlay and align it with the fender vent. Smooth it out slowly to get rid of any air bubbles. When it comes to maintenance, just use a mild soap and water to clean them. Avoid using abrasive cleaners as they can scratch the surface. Also, be gentle when washing your car around the overlays to prevent them from peeling. If you notice any edges starting to lift, you can use a small amount of adhesive to re - attach them.