As additive manufacturing of metal components is becoming increasingly significant due to high levels of design freedom yet features insufficient surface quality, finishing processes need to be further developed. As an alternative to machining, investigating the ball burnishing of powder bed fusion (PBF) workpieces provides opportunities to advance fundamental research. Studying this method's capabilities, finite element analyses (FEA) were conducted based on a flow stress model parameterized with Split-Hopkinson Pressure Bar (SHPB) tests. The roughness smoothing and a macroscopic approach mapping residual stress distributions was modelled and validated. Improvements in surface integrity were confirmed in both the FEA and experimentally.