Use Blue Line Eraser spray to remove blue marking pen from your quilts. The blue line eraser gets the marks out the first time with no color migration to other parts of your quilt. This product even gets out lines that have been ironed. The handy pen can be filled with the blue line eraser solution to remove lines without spraying the whole quilt. Just fill, and "write" over the blue lines to erase. This kit also contains a blue marker for marking quilting lines.