It ends up double fold. you start out with two strips and sew them together. Treat that like you would if it had not been sewn, but it is a regular strip that you would fold in half. Sew it on like usual. When you wrap it over, one fabric is on one side, the other is on the opposite side. The fabric that folds over to the opposite side is cut 1/4" wider so that it will show.
I tried it on scraps and it worked for me :wink: