Was wondering if anyone has encountered this before. I turned a natural edge bowl out of Linden (basswood). I used a 2 inch foam backed sanding mandrel in my drill. Lathe speed was about 250 rpm. But when I finished with 400 grit, some of the rust coloured dust from the bark layer had stained the nice white wood below it on the wings. Would you have done anything differently? Perhaps I should have shut off the lathe and used the sanding discs on a non-rotating bowl. I don’t turn that many natural edge bowls and have never had this happen with any of the woods I have used. Also, the fine dust seems embedded in the soft wood, so I’m not sure anything can be done to remove it.