~ i have installed over 300 clear bras and removed quite a few as well...

first let the car sit in the hot sun and then you'll need to use a heat gun or blow dryer to heat the film for ease of removal (small section at a time)... this aids with the release of the adhesive (kinda)... the hard part is removing the remaining residue left on the paint once the bra is off... you will need an adhesive remover
(3M makes some)... goo gone is worthless in this case. apply remover on a micro fiber towel and rub as needed (your finger nail helps too)… once the paint surface is clean (very time consuming)... polish the surface and wax as normal.

hope this helps.