The surface treatment stage is a critical process that determines the final quality and durability of components. We carefully analyze the unique physical and chemical properties of each material, including aluminum, steel, and plastics, as well as the intended application of the final product. Based on these characteristics, we apply optimal surface treatment methods, such as anodizing to maximize corrosion and wear resistance, and coating to enhance visual quality and surface protection. Through these customized surface treatments, we ensure outstanding durability even in harsh environments while enhancing the aesthetic value of the product.