Why Wax bath:
If hot wax is poured into cold metal chain, it will form a thick layer of wax. As result, the wax will easily come off in a chunk. However, if you wax bath your chain, and let the chain's temperature rise, it will allow the wax to form a protective layer, which is a better wax adhesive to the metal. At the same time, since the molten wax will have a low viscosity, it can penetrate into the tiny gap of the rollers.

