I just finished quilting a quilt that was marked in ink on every block. It was made in the early 1980's by my MIL. So it has taken me this long to get up nerve enough to quilt it. I quilted on my sit down machine when time allowed. I read somewhere to use Club Soda, but I have not tried this method yet. I know that hair spray sometimes will take out ink, but I don't know if this will work on fabric. It sure did on my ruler, there aren't any marks left at all, all the numbers are also gone. As of yet I haven't tried anything yet to remove the ink. So hoping someone has some ideas what will work.