After pouring the beeswax pillars, we again use the heat gun to keep the sides and bottoms from cooling too fast.
After about 12 hrs in the cooling tank (set at about 130 degrees) the wooden dowels holding the wicks are removed. There is usually a hole in the center of the beeswax pillar caused by shrinkage. These are carefully topped up with hot beeswax. Sometimes the heat gun is again used to "feather" in the solid wax with the melted beeswax.
If the beeswax pillars do not cool slowly enough they will have large cracks in them and they will have to be re-made.