I have the F&Porter Mechanical Pencil and loved using the white to mark a quilt. Only problem was refilling -- it took me forever each time as the lead would not stay down--every time I would press on it to mark, it would retract. Finally the lead would never stay down so I gave up and bought another. I wrote F&P about the problem but never received a response. Keep meaning to take it back to Joann's to see if they would replace it without a receipt. Other than that I loved it. It didn't leave any residual marks on the quilt but I only marked one days worth at a time.