my Lotus had a clear plastic film ( Armourfend I think) applied to the nose and sills as standard by the factory. Within a few months it had got what looked like rust streaks underneath ( on glass fibre) so the supplying dealer had it replaced with an alternative which was less thick. This has given some protection ( the paint on the Lotus is very prone to chips for some reason) and its near invisible. It hasnt protected on one sill where I must have gone over something sharp which has cut through both film and paint.
Not sure I would pay to have a car filmed like this - all you are doing is protecting the paint for someone elses benefit and I doubt it makes the slightest difference to resale.
