Abrasive products which would scratch or damage the film should not be used. Nothing stops fading. Again, they are designed to make the window glass more shatter-resistant. In the event of a wind storm, these films may have significant safety and security value. 3M Scotchshield films were originally developed due to the international concerns and needs for improved safety and security against terrorist acts of bombings.
Time is short, and often they move on.
However, if they are determined to gain entry, they will get in. It is generally recommended that the property have proper alarm systems in addition to Scotchshield ultra window film.