We had to "blackout" windows on a storefront to block the view of studs, insulation, etc.......They did the interior build out before we could put blackout film on the inside of glass. We decided black cast vinyl would be best for exterior application with westerly sun exposure. It's been 5 years and it's starting to look weathered with some minor scratches and tears. Owner wants to know if there is anything we can do to prolong the life of graphic. I know anti-graffiti film will do this, but I guess the real question is will the vinyl hold up when removing damaged anti-graffiti? We've installed hundreds of sq ft of anti-graffiti, but only on plastics and mirrors.