The limited material variety of laser sintering increases with polypropylene and extends the technical fields of application. Similar to polyamide 12, which is mainly used in laser sintering, the surface topology of polypropylene components is often inadequate because technical applications increasingly require surface roughness at injection molding level. In addition to reducing surface roughness by chemical and mechanical post-treatment, there is a need to optimize mechanical properties. According to the current state of the art, the laser sintered samples are cleaned by mechanical-abrasive blasting after removal from the powder cake, which does not result in a significant reduction of roughness. Subsequently, further chemical and mechanical post-treatment steps can follow in the field of subtractive post-treatment. In the present investigations, polypropylene samples are immersed in 100 °C warm toluene for varying residence times. This results in a considerable reduction of roughness at constant component dimensions. The variation of the parameters during the mechanical post-treatment by vibratory grinding does not influence the surface roughness. The mechanical properties such as tensile strength and Young´s modulus show no change, regardless of the post-treatment process selected. The elongation at break increases significantly with the immersion time during chemical post-treatment, whereas mechanical post-treatment has no influence.