Seedtick and qajaq59 have it right - fluxing lead and lubing cast bullets.
Afy, I used two pans in a double boiler arrangement to melt down the chunks, then strained the glop out of the wax by pouring the melt through pantyhose into a third pan.
The third pan replaced the original melt pan in the double boiler to keep the strained wax liquid while I ladled the wax into the muffin pans.