Round steel can have different surface finishes. The as - rolled surface is the natural finish after hot - rolling, which is relatively rough. A polished surface can be achieved through processes like grinding and buffing, providing a smooth and shiny appearance, often used in decorative applications. Galvanized surfaces offer corrosion resistance with a zinc - coated layer. Anodized surfaces can be obtained for some alloy - steel round steel, enhancing corrosion resistance and providing different colors for aesthetic purposes.