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Mechanical polishing covers grinding, buffing, and polishing – all processes for improving the surface conditions of a product for decorative or functional purposes.
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mechanical Polishing Process
The process is to do grinding first, polishing second, and buffing third. In general, grinding permits far more aggressive abrading action than polishing. Likewise, polishing is a far more aggressive abrading action than buffing. In grinding, polishing and buffing, labor is a major variable in the process. The requirement is highly skilled labor with years of experience and a thorough knowledge of their craft. The basic mill plate and sheet metal finishes for stainless steel include five grades that have finishes that are produced mechanically by using abrasive compositions and buffing wheels.
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Electropolishing

Electropolishing, also known as electrochemical polishing, anodic polishing, or electrolytic polishing, is an electrochemical process that removes material from a metallic workpiece, reducing the surface roughness by leveling micro-peaks and valleys, improving the surface finish.