In the manufacture of useful multiple-layered metallic articles such as costume jewelry, for example, it is common to first form a base metal, usually tin or brass, into a desired shape as by stamping or casting, and then by the well known and understood technique of electrode position or electroplating, applying layers of metal or metal alloy to form the finished piece. Usually a layer of copper is applied first over the base metal to give the piece ductility and provide a good adhering surface for the plating of a subsequent layer or layers of material. Next, a corrosion-resistant layer of nickel frequently referred to as a "brightening layer" is applied over the copper layer, and then finally, followed by a "top coat" or outer layer of precious metal such as gold or silver. A significant disadvantage of the well known method just described is that the ions from the nickel layer migrate to the "top coat" surface causing many consumers who purchase and wear such costume jewelry to suffer adverse allergic reactions, i.e. it is well known that many people have skin that is sensitive to nickel. Thus, it is not uncommon for such "sensitive" consumers to break out with skin irritation, itching, reddening or flaking of the skin in the region where the costume jewelry comes into contact with the wearer, e.g. the ear lobe region in the case of earrings.