Electrochemical polishing of 304 stainless steel sheets typically exhibits the following four characteristics: (1) Electrochemical polishing is more efficient than mechanical polishing, but large workpieces cannot be placed in the polishing tank, and a significantly high current is required, making electrochemical polishing difficult. (2) The surface current density of electrochemically polished workpieces must be uniform; otherwise, the surface brightness will be uneven, which may necessitate the use of cathodic facsimile diagrams. (3) When the current is high, the fixture and workpiece must have a sufficient contact area and good contact to prevent localized overheating and damage to the workpiece. (4) Some 304 stainless steel sheet polishing processes at Auschwitz are not suitable for Martel 304 stainless steel polishing, leading to easy corrosion. Chemical polishing of 304 stainless steel sheets involves immersing the parts in an appropriate solution, as the solution dissolves the surface protrusions faster than the concave parts, resulting in a smooth surface and achieving the polishing purpose. Generally, chemical polishing has less polishing power and only a small amount of brightness. However, it is less labor-intensive and time-consuming than mechanical polishing, and it can polish the inner surfaces of small parts. There have also been reports that by adding whitening agents, the surface of 18-8 type Auschwitz 304 stainless steel sheets can be polished to a mirror-like luster.