I was watching LeRoy Hyatt on video, tie a LeTorte Hopper, and as he stripped a slip for the wing from a turkey tail feather, he offhandedly mentioned that he had sprayed it with a "fixative". What is that he likely used? My wife had a thought that it would be spray on fabric adhesive that one can get at a fabric store. Is this anywhere in the ball park? I assume that the goal is for the feather barbs to stay together to form the folded wing structure.