I just picked my car up last week, and am delighted with the results. Hopefully won't have to deal with road-rash issues for a long time.
I had paint correction done before the film. Car looks better than new. Detailer did a fantastic job. Real professional. He also did a C-Quartz coating of the whole car after filming. ( Yes - no wax required on film or coating. ) His total cost was approx $ 1800.
Filmed full front clip, mirrors, a-pillar, and rockers, and he will do scoops as well. If you didn't know it was there, you would never notice. Really nice installation. Cost was approx. $ 2400.
Xpel has pre-cut, computer-generated patterns for these parts. Rest of the car would have to be hand cut. Decided I would put that decision off to a later date, when I can work out some logistics. Feel pretty good about the new protection though.
Ron Savenor (roketman) has done his GT and Porsche GT3 completely, and they look terrific. I looked at him using quick detailer on the GT in Detroit, and couldn't believe it was filmed. He would be a good source for info on specifics of full coating.