ecp: I just attached a canopy to my Sig Four Star 60 airplane. I am a beginner builder but using Formula 560 was idiot proof. I laid a small bead of glue inside the canopy and then pushed it down into place. I then put lots of masking tape to hold it and left it alone for 24 hours. When I removed the masking tape, it was a perfect job. There was a tiny bit of overflow of the glue that had squeezed out. It was clear, but it also rolled up in a ball when I rubbed it with my finger and was easy to remove. I glued directly over Ultracote with no preparation done to the covering. No sanding, no pin ***** holes, nothing.