I have mended quilts that are getting worn, not antiques, but favorites. I just fold the two edges together and handstitch. There is a possibility that it would go puckery, but if it's old enough to be getting worn, it's probably wrinkly and puckered a bit anyway. I have thought that a mended job by hand is much better than a worn/holey area. There are those favorite quilts that we keep forever. S.