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http://www.ganoksin.com/borisat/nenam/buffing-material.htm
Red Rouge
A product traditionally made of iron oxide, pulverized and graded, used in jewelry work. Darker-colored, coarser grains are called crocus and are used for grinding. The finer grains are called rouge (French for "red") and are used for polishing steel and precious metals. It is the finest of all rouges. Rouge is often mixed with a binder and caked into a bar form for easy application to a buffing wheel.
Green rouge
Primarily used in final finish buffing operations on stainless steel, steel, brass, aluminum, nickel, and chrome. The green rouge is a chrome oxide, and is considered the best all around luster compound for these materials. Green Rouge compound imparts a high luster to rhodium, platinum, chrome, stainless steel and other hard metals. 100% green rouge for superior final finish on steel, stainless and chrome.
White rouge
The white rouge is the softer, calcite alumna type. Primarily used in the final finish of steel, stainless steel, and zinc. This compound is also a favorite in coloring aluminum and brass. Use on platinum, chrome, and stainless steel. Produces a chrome color