I also am a fan of the ceramic pencils- a very nice fine line- available in multiple colors (I have green, yellow, pink and white) a light-fine line shows up well & lasts until you remove it. I have erased (pencil comes with fabric eraser) a few small lines- but generally-since I wash every completed quilt- I just leave the marks until the quilt is finished; quilted & bound; then I wash/dry it- the marks are gone.