Adding details to already quilted is tough but it can be done. You just bead thru the top layer and not all the way thru. If you add a black tail over the puckers, you have them covered and you will have legs. Or at least that's the way the photo comes out. I recently finished an art piece where I embroidered, use a very sharp needle. Before I bound it I placed a cover fabric on the back to cover up the stitches and threads on the back. I used a lightweight fusible to "stay" the stitches and threads.