When I wanted some trapunto effects when I did my appliqué, I sewed around the outline with water soluble thread with a layer of Hobbs 80/20 batt under the background. I trimmed the batting excess off and then sandwiched my quilt as usual.
I have also tried this method on a little cheater door sign and I will try and post a picture of it. It also helps to quilt the background closely around the appliqué to help it puff up.
Last edited by Tartan; 05-23-2013 at 11:08 AM.