I repaired one once for a childhood friend's father. It was made in the 1950s and partially in tatters....huge open areas. The backing was holding it all together. Luckily it was Xmas time and I found the exact shade of green that is only available at that time of year. The rest was white muslin and butter yellow. I made templates from the intact blocks and replaced the missing chunks of batting etc. It looked brand new almost when I was done, they said. It was very time consuming but I was glad to do it for them. They were very nice to me during my difficult childhood. Maybe after (if) I retire I'd do it again. Antique quilts amaze me. No fancy tools like we have yet their's are better than mine alot of the time....lol