I have also used the applique foundation paper that washes out. It is ironed onto the back of the fabric and then rather than starching or gluing down the seam allowance, I can just attach the piece with a bit of glue or pin to the background and then needleturn the fabric under the foundation. It is thick enough to make a really nice edge. Then when it is washed, the foundation just dissolves so no picking out the paper. I tried the Karen kay Buckley method and while it is precise, it is a lot of labor. This works for me and gets a good result without all the pre work.