I had a very old quilt my grandmother had made that had become very thin and fragile. I unsandwiched it and then appliqued the top onto a piece of muslin and then had the whole thing requilted with new batting and muslin on the back as well. It actually looks really really good. There were a lot of spots where the fabric had worn to the see through point and with muslin behind the entire top it looks very sturdy. I also extended the muslin about 8 inches out from the edge of the quilt so hand wouldn't be tugging so much on the delicate fabric. I expect to get another 20-30 years of use out of the quilt.