Machine hammer peening (MHP) is a new method for finishing of surfaces. With this method, the workpiecesurface is hammered with a spherical carbide tool. The mainobjective of the study was to evaluate whether the MHPmethod could become a plausible substitute for manualpolishing in pressing die manufacturing where nodular castiron is a common workpiece material. To do this, samplenodular cast iron surfaces were hammered and evaluated. Changes to the surfaces were evaluated using surfaceroughness measurements, hardness measurements and opticalimages. First of all, the workpiece surface was smoothened. Secondly, the surface hardness was increased significantly. Thirdly, the nodules on the workpiece surface wereaffected. They appeared to be smaller and not as visible. This effect would likely create a die surface less prone to gallingsince the cavities would not be filled with sheet metal to thesame extent in a forming operation. In addition, withMHP, theamount of polishing needed to manufacture a die surface canbe reduced because of the smoothening effect.