Burnishing (pottery) Information
Burnishing is a form of pottery treatment in which the surface of the pot is polished, using a hard smooth surface such as a wooden or bone spatula, smooth stones, plastic, or even glass bulbs, while it still is in a leathery 'green' state, i.e., before firing.  After firing, the surface is extremely shiny. 
Burnishing can also be applied to wood, by rubbing two pieces together along the grain. Hard woods take the treatment best. Burnishing does not protect the wood like a varnish does, but does impart a glossy sheen. 
- Black-burnished ware, a type of Romano-British ceramic
- Black-on-black ware, a pottery tradition developed by Puebloan Native American ceramic artists
- Northern Black Polished Ware of Iron Age India
- Von Dassow, Sumi. "Burnishing Pottery: A Step by Step Guide". ceramicartsnetwork.org. The American Ceramic Society. Retrieved 31 August 2020.
- Peterson, Beth. "How to Burnish Pottery". The Spruce Crafts. The Spruce Crafts. Retrieved 31 August 2020.
- "Burnishing Versus Sealing Concrete". customconcreteprepandpolish.com. Custom Concrete Prep & Polish. Retrieved 31 August 2020.
- Burton, Walter E. (1957). Burnishing Puts a Fine Finish on Wood or Metal (108 ed.). Popular Mechanics. p. 205.