This research article aims to investigate the impact of various types of powder coatings on the resulting dimensional accuracy in the optical 3D scanning process. The experimental study utilises the GOM ATOS II Triple Scan scanner with measuring volume MV100 to conduct a series of measurements. Different powder coatings, varying in composition and application area, are sequentially applied to the measured etalon. The digitised data is then imported into the GOM Inspect software, enabling necessary measurements and result evaluation. This paper leverages engineering knowledge and proficiency with the GOM Inspect metrology software. The anticipated outcomes of this experiment are expected to offer novel insights into the influence of diverse powder coatings on dimensional accuracy. These findings can have practical implications across industries where measurement accuracy is crucial. Furthermore, this research can serve as a foundation for future advancements in the field and provide valuable guidance for selecting the appropriate scanning powder for specific optical 3D scanning applications.