Leslee,
Yes, I have. I had a wall hanging that just would not lay flat against the wall. First, take the longests measurement. I put mine in the washer, spun it out and took it to my table where in pinned it down, stretching it out to the measurement taken above. Pin the corners,and centers first and then work toward the corners. Tug and pin about every 1" making sure you are catching the batting as well as the binding. Work around the entire project. Surprisingly, it only took a day to dry. -- If you are doing a full-sized quilt, you may have to do this on the floor. Oooohhhhh, my aching back!!
I hope you are as pleased with the results as I was. I have another to do, but it will have to wait until after the holidays. I need my table for other projects.
Blessings, Suzanne