You could also buy some "clearbra" film. This stuff is used on $100k - $1m+ cars all the time for front end protection from rock chips. Goes on wet with a 50/50 mixture of water/alcohol. I bought a bulk sheet, 18" wide x 1 yard, a few years ago and I use it on anything with a screen I want to protect (cell phone touch screens work fine with it, camera screens, etc.) and on my bike where the cables touch the frame and rub the paint.

I found one bulk film seller here: http://www.clearmask.com/vehicle_pag...FILMS&year=all and there are likely others.