Bar Keeper's Friend
works great on the porcelain depending how deep the black marks are. I used it for the heavier rust spots on mine and I also had some black marks especially on the sides from things rubbing as the racks went in and out. The Bar Keeper's Friend cleaned it all up nicely.
works great on the porcelain depending how deep the black marks are. I used it for the heavier rust spots on mine and I also had some black marks especially on the sides from things rubbing as the racks went in and out. The Bar Keeper's Friend cleaned it all up nicely.
