Just a little tip about Wonder Under - do not even try to hand sew through it!!! If you're going to hand appliqué with turned-under edges you don't need any kind of fusible at all. If you just want to fuse the pieces down and then cover the edges with a blanket stitch, satin stitch or??? Just use a good quality but soft fusible - for example Lite Steam-A-Seam2. The soft fusible will make a better quilt or whatever you might be making. Some fusible are stiff and make the end product unacceptable. And make sure you have not added any seam allowances with doing fusible appliqué. If you have already,applied a fusible and your pieces have the seam added I suggest you make a paper or,plastic pattern of your,pieces and use these templates to trim the seam allowances off. Otherwise yiurmpieces will look big and perhaps a bit,wonky.
Sandy in Mooresville, NC - I've been hand appliquing since 1989