Peach sky, purple reflections on water. trees in background. Encaustic is an original one of a kind piece of art, no two can ever be the same even if you try. Encaustic is created by melting tree sap resin and beeswax as a medium and applying it to a wood substate. Pure pigment is added for various colors. Each layer is fused with a heat gun or torch to fuse them permanently together. When the painting is finished it is polished with a soft rag to a high gloss finish. No glass is used and they are usually on a cradled wood panel, MDF board or on paper.