In order to obtain a glossy mirror-like surface. Each of the yacht hardware is repeatedly polished by a polishing wheel to eliminate the slight unevenness on the surface of the part. After mirror polishing, the fine scratches remaining on the surface after the polishing process are eliminated, making the product more beautiful and fine. The ideal polished surface should be a smooth, shiny, non-marking, non-embossed, pit-free, metal-free layer of mirror-like surface.