Continually soak the edge with lighter fluid and slowly take a plastic razor blade to it keeping the edge saturated with lighter fluid as you cut the adhesive away. See how that does for one.

Blast it with freeze spray.

Freeze spray is worth a shot. Then you clean up the sticky gunk left behind with flour+goo gone. I would NOT use lighter fluid, Naptha is preferred.

What do you think lighter fluid is made from?

We're all a bunch of comedians here.

Either approach will be relatively innocuous to the paint. The freeze spray only needs to focus on the mylar. The lighter fluid/naptha can be done little by little to see if you get good results. If the glue responds/loosens it will be acceptable. If the glue does not loosen you may have a bigger issue. There will be other materials to try to get the adhesive loose if the naptha doesn't work.

Both ways are easy. Both can be tried in small doses to see if they work before going to town.

If you must know, Naptha is cheaper and leaves less oily residue as it evaporates.

That looks like vinyl, not mylar. I don't think freezing it will do you any good. I think hair dryer and patience will probably be the best you can do.

Very well done. Looks like the damage is minimal.