🟡 As-Machined
Description: No post-processing. Visible tool marks, accurate to spec.
Materials: All machinable metals and plastics
Use Cases: Prototypes, internal features, low-cost parts
Roughness: ~3.2–6.3 µm Ra
🌪 Bead Blasting
Description: Applies a fine matte texture using high-pressure glass beads.
Materials: Aluminum, stainless steel, titanium, some plastics (Delrin, Nylon)
Use Cases: Enclosures, aesthetic parts, deburring
Finish: Uniform, matte/satin
💎 Anodizing (Type II – Decorative)
Description: Electrochemical process to enhance corrosion resistance and appearance.
Materials: Aluminum only
Use Cases: Consumer electronics, cosmetic panels, light wear parts
Colors: Black, clear, red, blue, custom
🛡 Anodizing (Type III – Hardcoat)
Description: Thicker anodizing layer for wear resistance and durability.
Materials: Aluminum only
Use Cases: Aerospace, tooling, high-wear surfaces
Color: Gray to dark gray (limited dye options)
⚙️ Powder Coating
Description: Dry powder applied electrostatically, then baked. Durable, thick, uniform.
Materials: Steel, stainless steel, aluminum
Use Cases: Consumer goods, industrial covers, frames
Finish: Matte to gloss
🧪 Chem Film / Alodine (Chromate Conversion)
Description: Chemical process to enhance corrosion resistance while preserving conductivity.
Materials: Aluminum
Use Cases: Aerospace, electronics enclosures, MIL-spec parts
Color: Gold or clear
Note: Less durable than anodizing, but electrically conductive
🌫 Black Oxide
Description: Converts steel surface to a black oxide layer; minor corrosion protection.
Materials: Steel, stainless steel
Use Cases: Fasteners, tools, low-cost cosmetic parts
Finish: Matte black, slightly oily
Note: Often requires post-oiling
🧼 Electropolishing
Description: Electrochemical removal of material to smooth and polish surface.
Materials: Stainless steel, titanium
Use Cases: Medical, food-grade, and vacuum components
Finish: Bright, smooth, corrosion-resistant
🪞 Polishing / Buffing
Description: Mechanical abrasion for glossy finish.
Materials: Aluminum, brass, stainless steel, plastics (Delrin, Polycarbonate)
Use Cases: Cosmetic parts, handles, mounts
Finish: Mirror-like or high-gloss
🧊 Brushed Finish
Description: Linear mechanical abrasion for a satin, directional grain.
Materials: Aluminum, stainless steel, some plastics
Use Cases: Appliances, enclosures, control panels
Finish: Clean, professional appearance with visible lines
🔩 Zinc Plating / Galvanizing
Description: Electroplated or hot-dip applied zinc for corrosion resistance.
Materials: Steel, iron
Use Cases: Outdoor hardware, fasteners, brackets
Finish: Bright silver, yellow-chromate, or black
Neptune Labs 