I don't prewash. I use a color grabber in the wash after the quilt is done. I have used starch on seams to make them crisp, but just started doing that. I never thought of pinking the edges of the fabric, will have to get a cutter with the pinking blade and then try some prewashing. It's the ironing and starching after washing that gets me. Need all my strength for the actual cutting and sewing. Learned some new things here today. Thanks.