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<p>[QUOTE=&quot;GDJMSP, post: 760031, member: 112&quot;]A coin dip is basically a liquid that contains an acid. The reason the dip removes the toning is because the acid it contains literally eats away a very thin layer of metal on the coin thus removing any toning/tarnish that the coin may have. This exposes a new, underlying layer of the metal and makes the coin look new and shiny again.</p><p><br /></p><p>However, dip also removes luster from the coin. It is the luster that tones most easily. Remove too much and the coin is damaged forever.[/QUOTE]</p><p><br /></p>

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