I missed your original thread. But I always use lemon extract to remove ink. It just dissolves it. Works better for me than alcohol. Of course sometimes it depends upon the ink, some is easier than others.
When I was a new quilter, one of the first quilts I made I marked with a pencil. Those pencil lines are still on that quilt even though it has been washed several times and many things have been tried to remove it. We live and learn.