I have had a problem with some rock chips on my '99ML320. I think my wife drives the car too hard and too close to others through new residential areas we live near. Anyway, I was told that the protective "films" sold by 3M can really help this problem and they can be professionally installed for about $250. Has anyone had any experience with these. My car is black and I have gotten a great wet look shine through using the Meguires Gold-class combo. How do these do with no reducing the shine? Do you wash and wax them like normal? Does dirt stick more or less to the film? I wouldn't consider using this on my black '99 CLK320, but the ML is getting kinda beat up. Also, any thoughts on how this could effect resale (in 4-5 years)? Can this stuff be removed easily?

Any help is appreciated.

Eddie.