I'm building a Balsa USA Fokker Dr.1 I just started covering the wings with Solartex and I can't get the covering to conform to the scallops at the trailing edge. I thought I could fold the top around to the bottom and iron it there, then hit it with the heat gun and have the covering shrink right down to the shape of the scallops but that doesn't happen. It shrinks tight across the high points of the scallops but I end up with a double layer of covering that just doesn't look right to me. Is there a trick to it? I'll attach a photo so you can see what I'm talking about.

Dan