Here you see me waxing the bottom of my pinch pots. I melt a couple of paraffin wax bars in a crock pot. You can pick up the wax in the baking department of any grocery store. I like to wax the bottoms of the kids clay project so that it resist the glaze. I think it makes a nice even line on the bottom and I don' t have to wipe glaze from the bottom before going in the kiln. The wax buns off the pot when firing. It is a extra step but I feel worth it!