Using automotive clay - to remove surface pollutants and abrade the debris from the paint film surface leaving behind an ultra-smooth surface that will make your paint protection adhere better and improve its durability. You can use detailing clay on any smooth, hard surface, including glass (exterior) to remove heavy road film, bug deposits and water spots, and chrome. Do not use on clear plastic, such as headlight lenses as it may cause ?fogging?. The best way to describe the proper method for using detailer clay is to use plenty of the lubricant and aquaplane the clay bar over the surface in straight-line motions, in the direction of airflow and using light hand pressure, you should hear a slight noise and feel some resistance; this is the contaminants being abraded.