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Interesting to me was that my grandmother always had bowls of wax fruit used as decoration. This painting is based on a bowl of real fruit, but is painted with wax.
Encaustic paintings are created with pigmented wax applied in layers. Top layers are fused to underlying layers with heat; usually a heat gun, propane torch or iron. Check out Joanne Mattera's blog. She is a quite well known encaustic painter.
This painting, "Wax Fruit (Nectarines)" is 30" x 40". Click on the image for an enlarged view.