[Leroy]

Check out your local paint shop that sells auto paint and equipment. They should have a spray paint that is like a clear rubber coating. I used it about 8 yrs. ago and still no rock chips.
Its looks a lot like the stuff they use on some of the new cars on the lower rocker panels. It comes in a spray can, so its easy to work with, just mask off and spray!
Good Luck,
Lee