I use a single sided soluble fusible to turn my edges for machine applique. I would think double sided fusible would stick to your iron as you press it to turn the edges. I fuse my single sided fusible to the back of my piece. I use the Elmers school glue sticks and an orange stick (manicure tool) to turn my edges. I like the purple glue sticks the best so I can see the glue. I then attach the piece to my background with Roxannes glue baste it and machine stitch them down. This is the best way I have found.