I just repaired a polyester quilt also made in the 60's by my DBF's grandmother. She had put two patches of flannel shirting in for some reason and they had fallen apart. Had to redo the entire quilt without making it look like it....."grandma" was no seamstress!!! Replaced the flannel, repaired wonky seams and put a new backing on it....the hardest part was tying it back together as she had in the same holes in the polyester! Took it to the laundry mat to use the big oversized washers. Good as new!!