Please note that all fields followed by an asterisk must be filled in. The topmost layers of the metal react to form a thin gray or black coating that essentially shields the underlying metal from further chemical reactions. horse tack. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Different metals have different properties. This results in a coating of corrosion on the outer layer of the metal which reduces the metal’s luster. It is usually a metal oxide, the product of oxidation. Step 1, Find a piece of new shiny metal. Bake in the oven for an additional hour. Put them somewhere to put them to cool off and let the rain do its work; ideally somewhere to give them time to rust over the winter. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. You can draw your lines with a permanent marker, but I prefer to use a chalk marker . 4. In the case of silver jewelry, when silver combines with sulfur it creates silver sulfide, which looks black. That way you can easily wipe away any stray marks that are left on your final piece. make the item rust almost instantly. Get the free guide! wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Use all natural baking soda to safely and effectively clean tarnish off your sterling silver or gold jewelry. Squeeze a small amount of toothpaste on a towel or a cotton napkin then rub it on the metal slowly to remove tarnish and shine it. Apply a dab of toothpaste to the tarnished area of the metal. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. very famous buildings, and as the metal used for the Statue of Liberty, This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.