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An improperly cleaned Indian Head cent from 1900. Note the wear present, as well as tarnished areas on the "brilliant red" surface. Coin cleaning is the controversial process of removing undesirable substances from a coin's surface in order to make it more attractive to potential buyers.
Sealed, or lacquered, copper will present as much shinier than raw, or natural, copper—and it's also much easier to clean (tackle sealed copper with a warm, wet dishcloth and dish soap).
Brasso has also been used to polish out scratches in plastics: It has been used to polish CDs, DVDs, screens, and pools to repair scratches. It is a mild solvent and an extremely fine abrasive, so when applied to the reflective surface of the disc and rubbed radially (in straight lines between the edge and centre), it can smooth scratches and reduce their effect.
Production in the Old Copper Complex in Michigan and Wisconsin is dated between 6000 and 3000 BC. [8] [9] Natural bronze, a type of copper made from ores rich in silicon, arsenic, and (rarely) tin, came into general use in the Balkans around 5500 BC. Previously the only tool made of copper had been the awl, used for punching holes in leather ...
The removal of oxidization (tarnish) from metal objects is accomplished using a metal polish or tarnish remover; this is also called polishing. To prevent further unwanted oxidization, polished metal surfaces may be coated with wax, oil, or lacquer. This is of particular concern for copper alloy products such as brass and bronze. [2]
Instead, an increasing number of people are trading dull, well-worn 30-year-old pennies by the pound. ... At current copper prices, the melt value of older pennies is well over two cents.
Renaissance Wax is a brand of microcrystalline wax polish used in antique restoration and museum conservation around the world. Commonly used to polish and conserve metal objects, it is also used on gemstones and such organic materials as wood, ivory, and tortoiseshell. The product is sometimes used by reenactors to protect armor and weapons.
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