This research studied the effects of certain unique dynamic behavior of MRF-based slurry on finishing characteristics. In the finishing process, the iron particles and abrasive in an MRF-based slurry are driven inside the mass of the slurry by the friction against the inner surface of the tube. Since the iron particles are attracted by magnetic force to the area with higher magnetic field intensity and gradient, i.e., the area corresponding to the pole edges, the iron particles experienced the combination of being dragged along the tube rotation and being pressed out from the center of the mass in the axial direction of the tube. Accordingly the accumulated cutting marks made by the abrasive in the slurry crossed to create a uniform finished surface. The increase of iron particle concentration in the MRF-based slurry increases the magnetic force acting on the MRF-based slurry and reduces the dynamic behavior of the slurry due to the increase in the viscosity, resulting in a finished surface with longer directional scratches. Although increasing the abrasive concentration enhances the material removal rate, excessive concentration causes agglomeration of the abrasive. This results in deep depressions on the surface and disturbs the surface finish.