Thanks, DK!

Yes, I took a piece about an inch wide, which stretches out to about four or five inches.  I only needed half of that for the actual canopy surface.

The next opportunity to try it on a canopy will be with my other P-47 build, the bubbletop.  I have the kit canopy for that one, and I think it will be easier to lay a larger piece of film over the whole piece, and then scribe along the frame lines, and remove the film on the frames.

Plus, the bubbletop has basically three or four frame lines to cut, one along the whole edge of the sliding section, and a couple lines on the windshield.

I like the Parafilm, but I'm still experimenting.  I'm curious to try it for masking camo patterns, too.