Car Glass Polish is specially formulated to increase visibility through your windscreen for safer driving The easy to use, deep cleaning solution removes traffic film, grease, wax, nicotine, insects and water deposits Autoglym Car Glass Polish is a window and glass cleaner suitable for use on interior and exterior glass. If your windows are perspex, acrylic or plastic use Fast Glass instead To use, work the polish in a circular motion ensuring all the glass is covered with a thin film. Increase the pressure over stubborn marks Car Glass Polish can be used on manufacturers tinted glass where the glass itself is darkened. For tinted glass using tinted window film stuck onto clear glass, use Fast Glass instead