I have been looking at paint protection films as another arm to my detailing business here in Portugal.
There are many people who apply the film but few actual manufacturers of the base film itself. Quality can vary and it is important to find out who is the base film supplier. These boil down to 3M and Ventureshield. 3M has a reputation for orange peel effect and being harder to fit. My research indicates that Ventureshield is the product to have and indeed I have heard a rumour that they have now been brought out by 3M who wanted to acquire the superior product.
Russell Paterson who has a Morgan dealership in Scotland also has a film company called Defendall
http://www.defendall.com/ These guys also do good work and use Ventureshield:
www.showtrax.net