I would try the satin stitch on a scrap block. Make sure that your sample applique has 'innie' and 'outie' cuts. You may want to try using a light stableizer. I find it really difficult to make it look nice and have much better luck with a narrow blanket stitch. I also like the look and the drape of a blanket stitch better. Depending on the design, a satin stitch may make the applique look heavy and kind of stiffens up the fabric due to the density of the stitching.