The quilting on my “quilting challenge” piece is finished. I almost used an entire spool of thread on it (1500 yards). To get rid of the blue pen marks, I soak my quilt in the bath with cool water and agitate it a bit to make sure the blue is completely out.
Then, I lay it on the floor and measure on the diagonal to make sure the quilt is square. I pin the corners and the sides.
Then, I let it dry. I usually have a ceiling fan and an area fan blowing on it to speed up the process. It is important to let it completely dry before moving it. When it is dry, I will do any trimming necessary to make it “square” before sewing on the binding.