Paint protection films are a clear, self-adhesive film that is applied to the painted surface of a car. Most often referred to as clear-bra. It's usually. i applied to protect and shield a vehicle from road grime and stones that could chip your paint. The film acts as a physical protective barrier between the paint and the elements, from scratches, chips, and stains. It was originally designed for use on military aircraft to protect them from debris during flight. Today, PPF is used on all types of vehicles, from cars and trucks, boats, rv's water sport toys and motorcycles. In fact, PPF could be used on any smooth surface to protect it from normal wear and tear.or many years.