Since you have first hand knowledge of this, can you tell me if you have the edges put down with clear vinyl? Check out this video - the last step they do is put down some clear vinyl (I think it is vinyl but it is some type of 3M product) on the edges of the wrap. This is the first time I have seen this. Also, do you know if they laminated the vinyl? Check out the second clip. Last, I wonder if you can put on some UV protecting clear laminate that will help with fading.
Sealing the edges...(4:00-5:00)
http://www.youtube.com/watch?v=B9_kHpa2enw
Laminating vinyl...(1:25)
http://www.youtube.com/watch?v=2dOAQT0qQAk