For the last few years Diamond Shield has been using what they call their Nano-Fusion paint protection film. My original Diamond Shield looked great when it was removed when I had the coach completely repainted after side panel replacement due to delamination about two years ago.
I had the Nano-Fusion film applied at that time and so far it has continued to look so much better even than the original. I have used Mequiar's liquid wax and 303 Protectant as recommended by Diamond Shield.
It also comes with a lifetime warranty to the original purchaser, which in part reads as follows:
Nano-Fusion Paint Protection 6 mil Film (“Product”) has a limited warranty from date of purchase. The film is warranted to be free from defects in manufacturing and workmanship and against peeling, yellowing, bubbling, or cracking of the film from UV exposure for so long as the original purchaser owns and operates the Vehicle on which the Product is installed