I never starched my fabric for quilting before but I tried by using the sizing recipe and found the fabric was easier to cut and handle. I don't believe in washing the fabric before cutting the pieces but many do. Whatever turns them on, is okay with me.I have talked to expert quilters who told me they never do. Fabric loses its newness from washing I believe. If a fabric is wrinkled somewhat, a quick spray of starch would do wonders to handle it. Try it both ways and see what you like.
Carol J.