My mother passed away more than 20 years ago and when we moved from our big house into a smaller one I found several boxes of polyester blocks already cut into squares. I am piecing them now. I just couldn't bring myself to throw them away after all the work she put in cutting them. They are working up so pretty. The colors are so bright. I guess I have sewn up about 75 of one pattern and goodness knows how many of several other patterns. We make quilts out of t-shirts, jeans, etc. why not the polyester. I was lucky enough to find some yardage at a thrift store so I can make the lattice or setting squares. I once made a throw out of fur from some old winter coats our kids had and it was (and is) the all time favorite when someone comes in all chilled.
I will make a quilt out of most anything I can get under the foot of my sewing machine.