Fused filament fabrication (FFF) has gained widespread acceptance for producing polymer components due to its low cost, design flexibility, and ease of processing. However, surface roughness remains a major limitation, particularly for applications requiring enhanced functional and aesthetic performance. In the present study, surface modification of FFF-printed polymers was investigated using two different coating approaches. Polylactic acid (PLA) specimens were coated with stainless steel 316L using the electric arc spray technique, while polypropylene (PP) specimens were coated with a ceramic enamel layer applied through a spray coating process. Square specimens were fabricated using optimized printing parameters to obtain smooth baseline surfaces prior to coating. Surface roughness measurements were carried out using a stylus-based profilometer, and the arithmetic mean roughness (Ra) was evaluated for both coated and uncoated samples. The results demonstrated a clear reduction in surface roughness after coating in both materials. The ceramic-coated PP samples showed a significant improvement in surface finish, achieving sub-micron roughness values, whereas the metallic coating on PLA also reduced surface irregularities compared to uncoated specimens. The findings confirm that suitable coating techniques can effectively enhance the surface quality of FFF- printed polymer components, thereby expanding their potential use in biomedical, industrial, and functional applications.