I also love the frixion pens as I do all my quilting on my Bernina mostly with the stitch regulator and free motion but I do use some of the hand quilting patterns that I convert over for contineous {sp} and trace with the frixion pen and I know the iron does not always erase the lines so I used an pld wash cloth dampened and rubbed and it is gone and I do use the all the time also for applique placement and the only one I leave alone is the red one