Wax resist is a great aid to potters and ceramicists who want to keep their glazing neat and clean. Wax creates a barrier between the clay and the glaze so it's not absorbed.
You can paint the bottoms to protect your pots from absorbing glaze, and you can also paint designs on your pieces to show off the unglazed clay with negative space.
The wax will burn off at low temperature during the bisque firing process, revealing designs, base colors, or just unglazed pot underneath.
The wax slows drying in the areas where it is applied.