Perhaps the most significant change in parts manufacturing is the advent of additive manufacturing (AM), also known as printed parts (3D). New challenges for mass finishing are presented by this process. In the current state-of-art, printed parts have rough surfaces, and burrs. Mass finishing is emerging as the preferred process for obtaining a smooth surface to meet both aesthetic and functional requirements. The cost of secondary operations is driving the need for improvements in printing technology. Until that is accomplished, a combination of blast finishing and mass finishing may be required to reduce the surface roughness for painting, e-coating, plating, or just product appeal.