3M Stone Guard is a transparent thermoplastic urethane film that helps protect your paint from the elements. It helps to reduce paint chips and bug damage as well, and it may improve your trade-in or lease-end value, since your paint will still look good with less chipping and other damage.
The material will not turn yellow, and it contains UV substances that help fight against damaging ultraviolet rays that can fade your paint. Plus, as long as 3M Paint Protection and Stone Guard is properly applied to fully cured paint, it will not harm the painted surface when the film is removed.