Again there is only so much you can do. You can get rid of light swirls using a very wet polish, with a machine similar to paintwork.
You can also use a heatgun to warm up certain films to get rid of scratches. That's not something I would do to be honest, I can't see that being a controlable technique. Differentials in film heat can discolour parts of the film leaving a patchy finish. Not something I want miglior doing.
If there are severe swirls in the film, I guess the only viable thing to do is replace the film.
Put it this way, I wouldn't want to maintain a "filmed" car with the miles I do.