This guide explains the different types of anodized aluminum finishes, including Type II anodizing, Type III hard anodizing, clear anodizing, color anodizing, and bright anodizing. It compares their performance, appearance, coating thickness, wear resistance, color options, and common applications. It also covers dimensional growth, aluminum alloy selection, manufacturing design rules, cosmetic requirements, quality control, and practical guidance for CNC-machined and sheet metal aluminum parts.