Steel media can be used for burnishing as well as light deburring. The low energy media impacts and friction pound the top peaks of the roughness profile, leaving a perfectly flat and shiny surface finish, also enhancing the corrosion resistance of the part by closing micro-porosity. The shapes of the media have low influence on the final roughness, but affect the efficacy of the process while offering different access relative to different geometries. Stainless and carbon steel media are available. Steel media has infinite lifetime.