Electropolishing is often referred to as a "reverse plating" process. Electrochemical in nature, electropolishing uses a combination of rectified current and a blended chemical electrolyte bath to remove flaws from the surface of a metal part.
This is not a process I recommend the chemicals are very dangerous here is a link to the MSDS on this process
http://msds.ogden.disa.mil/msds/owa/...y?imsdsnr=9609