You could just hand-sew the appliqué, if you were considering embroidering anyways. That way you get a really smooth invisible application (only tiny stitches around the edges), folded-under edges, and you can even get away with not using fusible interfacing so the flow of the garment won't be affected. Doing this in satin would be tricky though as it would want to fray; hand appliqué works best on a really stable fabric.
I have sealed the edges of appliqué with fabric paint; in one case I sewed the appliqué down by machine with invisible thread, and in another the piece was adhered down with Heat n' Bond Ultra (it was on a piece that would not get much flex and was already stiff)
COSTUME-CON 35 - 2017
The International Costuming Convention is returning to Toronto Canada!
4 Days! 4 Masquerades! Shopping, Tours, Parties, Costuming Panels and Classes, Cosplay, Props, Doll Show & Competitions, Steampunk, Sci-fi, Fantasy, and so much more!
the den of sarcasm - my website
Magpie Creations - jewellery and wa-loli accessories