Removing metal marks from stoneware?
I've got a nice covered jar by a prominent local potter here, and it's perfect, nice matte dark green glaze, except for a few lines of what look like metal scratches on it. I've tried scrubbing with a scrubby pad, scrubbing with Bar Keeper's Friend with a scrubby pad, and thhey're still there. The BKF made them a little less noticeable, but I'm hoping to make them go away completely.
Anyone have any ideas of what I should try next? Don't want to damage the glaze. Maybe just persist with the BKF is the best I can do? TIA.