Currently, FDM (Fused Deposition Modelling) is one of the most widely used methods in field of functional prototypes of components creation in various industries. When using RepRap type of printing in some cases occurs to reduced quality of surface area of component that is located on a support, or complications when removing the supporting material. For low surface quality of components produced by using this technology it is necessary to adjust this surface, according to specific customer requirements. The article deals with the problems of components surface post-treatment produced by FDM technology. Using standard machining methods with support and machining process simulation in Creo 3.0 software, by testing, cutting parameters and additional surface smoothing by acetone vapor bath method.