Originally Posted by Belles
What a darling quilt. No wonder you want to fix that bumpy bottom! I have made many Frank Lloyd Wright art glass quilts that have 3/4-inch black Kona cotton "leading" for the length of the wall hanging. Sometimes (well, maybe more times than I care to admit) the finished 1/4-inch "leading" doesn't lay straight. I purchased a plant mister and lightly mist the entire quilt. Once it is slightly damp, I straight pin the binding every two inches to a large particle board. Once it dries I have the straightest and most realistic fabric FLW art glass window. Whichever suggestion you use, good luck!
This is the same method you'd use to block a knit piece or a needlework piece. This should work on a quilt as well.