Encaustic painting is the heating of beeswax and damar, with or without added pigment, and adding layers to a porous surface. Heat must be applied in between layers and fused to the last one.
Over about 18 months you will see an encaustic painting get shinier and harder. During this time, impurities rise to the painting's surface and can be buffed gently to reveal the new look.
Shellac burning is a process of adding shellac to the cooled wax surface, allowing the alcohol in the shellac to evaporate, and then burning off. Shellac comes in clear or amber , used with or without added pigment, and transforms into beautiful web or cell-like forms after fire is added.