This product just came out and looks very promising. I always find 3M products to be great, and it will work on more areas then just the hood especially for track play time.

3M Paint Defender Spray Film provides protection where it matters. Defend your vehicle's paint from rock chips, bugs, salt, and other everyday driving hazards with this innovative spray-applied protective product. An invisible, seamless car paint protection applied as a spray-on liquid and dries to a continuous clear film that is completely removable and safe for clear coat. It protects any painted surface such as hoods, bumpers, fenders, mirrors, rocker panels, and more! Guards your car's paint against rocks, bugs, sand, scratches, dings, road debris and more to keep your vehicle looking newer, longer.