pic 1 - canopy glue &film (Ultracote) - the canopy is glued to the edges of a 1/8" balsa sheet shaped and tapered to match the inside of the canopy exposing 1/8" of wood as seen thru the canopy - so the film was added for cosmetic purposes.
pic 2 - wood screws & tape (tape is Great Planesproduct)
pic 3 - wood screws & film (Ultracote) - this was after a crash-n-rebuild. The canopy was really scratched so Ipainted the inside of the canopy with blue pearl auto paint.

Downside of film trim is that it must be stretched-shrunk to navigate tight turns.

Question to the experts. When working on ARF windshields / canopies, do you cut a strip about 1/16" thru the film exposing raw wood where the canopy meets the fuse or do you just glue over the Mfg's covering?