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Brass & Copper
Brass, White Brass, Copper, and Bronze are probably the most difficult of all the non-ferrous metals to buff because of the deep imperfections and softness of the metal.
In difficult situations, we recommend JacksonLea abrasive belts be used prior to buffing, and Greasestick can be used to speed up the finishing operation.
Less dense and drier compounds will eliminate some of the “glazing” of brass onto the buffs which can produce scratches. After removing the scale layer of metal, only enough buffing should be done to produce the finish desired (60/60 Cotton Cloth). Very aggressive buffing of castings may open up holes that lie just below the surface of the part.
Color buffing requires a soft buff such as BR or Domet Flannel in either a full disk or bias airway construction. Accumulated compound in the buff should be avoided since imbedded metallic particles will scratch the highly reflective surface.
Rouges, both green and red, are used to produce a very high luster on brass and copper. The rouges are designed to run very dry. Small amounts of rouge should be used, because excessive rouge on the buff has a tendency to run dirty and “back transfer.” This residue is difficult to remove, and will necessitate raking the buff to remove the excess.
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