Thin CA sticking to waxed paper
You gave a good chuckle, P_N!
I like the saran wrap idea, though.
Another thing I just thought of was at work they have 36" clear Mylar sheets, maybe .020" thick for the bead blaster window. I may try one of those as even it it sticks, the Mylar won't become a part of the airplane.
Thanks for all the good ideas, guys!