Metals are often chosen for their aesthetic appeal as well as their mechanical properties. In this case, the metal needs to be polished with rub n buff antique gold to get the desired look. There are several different ways to polish metal and certain considerations that need to be evaluated before choosing a polishing method.
Polishing metal is often done for aesthetic reasons. Polishing improves the quality of the metal surface and gives it a shinier shine, which is often desirable for displays or works of art. This is often accompanied by a buffing process on the metal, which results in a mirror-like finish. Another reason to polish metal is to remove surface contaminants for critical applications. Polishing achieves this by removing variations and contaminants on the metal surface. Although invisible to the naked eye, unpolished metal surfaces are riddled with variations and contaminants that may be undesirable in certain situations.
Polishing can also reduce the risk of corrosion by reducing the size and number of crevices on metal surfaces that can trigger corrosion. In the world of metallurgical evaluation, metals are often polished because it is the best way to observe the crystal structure, discontinuities, and defects of metal under a microscope or other observation tool.
The polishing process usually begins by rapidly rubbing the metal surface against a coarse-grained abrasive. After the metal is thoroughly polished to certain grit size, the process must be repeated with a finer grit size. This repetition is done several times until the desired level of polish is achieved. The abrasive material used in the polishing wheel depends on the type of material and its hardness. Softer metals such as copper and aluminum may require silicon carbide as the abrasive for polishing, whereas harder materials such as alloy steel may require aluminum oxide as the polishing abrasive. Often a liquid is used during the polishing process to prevent overheating due to friction.