Technically weak acid is used to remove glue residue. It's dirt trapped by glue. Weak acid that is safe for paint and ppf is vinegar. Soak the edge with it and let it sit for few minutes.
Thanks guys , so by using this method, it means the "stickiness" on the edge is lost? If so, does that mean you either have "dirt edges" or edges of the film unglued? If so, the questions is then, is there anyway to glue the edges back?Exactly!! Again a lot better than having paint work done on the car. It has saved my ass a couple times and I've seen a few other people have really good luck with it also. Sure it won't be perfect around the edges but it will look a hell of a lot better than having nicks and scratches all over the car.