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27-10-2011
Metal Polishing

Metal polishing is typically a multi-stage process. The process starts with a rough abrasive and each following stage uses a finer abrasive until the desired finish is achieved. The rough abrasive removes surface defects like pits, nicks, lines and scratches. The finer abrasives leave very thin lines that are not visible to the naked eye. Lubricants like wax and kerosene may be used as lubricating and cooling media during these operations, although some polishing materials are specifically designed to be used "dry." Buffing may be done by hand with a stationary polisher or die grinder, or it may be automated using specialized equipment.

 When buffing there are two types of buffing motions: the cut motion and the color motion. The cut motion is designed to give a uniform, smooth, semi-bright surface finish. This is achieved by moving the workpiece against the rotation of the buffing wheel, while using medium to hard pressure. The color motion gives a clean, bright, shiny surface finish. This is achieved by moving the workpiece with the rotation of the buffing wheel, while using medium to light pressure.

 When polishing brass, there are often minute marks in the metal caused by impurities. To overcome this, the surface is polished with a very fine (600) grit, copper plated, then buffed to a mirror finish with an airflow mop.


Well put together. I would like to add a comment. Within automotive restoration, Metal Polishing is a form of art. It is a skill acquired over a long period of time, usually many years. True master of the craft possess the skills of a jeweler. The above are great tips, yet there are only a handful of people who can actually do the task. There were many instances in my professional career when I had costumers bring me their parts that have been butchered and required much more work to restore if they wouldn't have been touched. When some one decides on starting a restoration project, they should seek professional advice well before trying it themselves. My doors are always open here. Anyone who is into things like restoring a classic car, an old jukebox, chroming a 20 pound shark bait, or copper plating their own ammunition are welcome to call or just pop on in for a visit. Deema Plant Manager New Toro plating and Polishing
Posted by: Deema | November 5, 2011, 1:42 am
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