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Surface Finishing

Enhance the look, feel, and function of your parts with a wide range of professional surface finishes — from cosmetic polishing to protective coatings. At Topmetry, we help you achieve the exact finish your product needs, whether for performance, appearance, or durability.
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What is Surface Finishing

“Surface finishing is the final step in the manufacturing process, applied to improve a part’s appearance, performance, or resistance to wear and corrosion. It can involve mechanical, chemical, or electrochemical methods to alter the surface of a part — making it smoother, shinier, more durable, or better suited for its end use.

Beyond aesthetics, surface finishes can also affect how a part functions: improving friction, conductivity, hardness, or paint adhesion. Whether you’re prototyping or producing end-use parts, choosing the right surface finish is essential for achieving both visual and technical quality.

Surface Finishes Topmetry Offers

Choose from a wide range of surface treatments to improve the appearance, functionality, and durability of your parts. Our finishing capabilities cover metals, plastics, and more — tailored to your project needs.
Finish Description Processes Materials
As Machined
As Machined
 Standard finish with visible tool marks. Sharp edges are broken, and parts are deburred. Ra ~3.2 μm. CNC Machining, Sheet Metal Metals, Plastics
Anodizing (Type II & III)
Anodizing (Type II & III)
 Forms a durable oxide layer to improve corrosion resistance and surface hardness. Available in multiple colors. CNC Machining, Sheet Metal Aluminum
Sand Blasting
Sand Blasting
 Abrasive media is blasted at high speed to create a smooth, matte, or uniform texture. CNC Machining, Sheet Metal Metals, Plastics
Powder Coating
Powder Coating
 Dry powder is electrostatically applied and heat-cured for a tough, colorful finish. CNC Machining, Sheet Metal, Injection Molding Metals, Some Plastics
Painting
Painting
 Standard wet-paint process for color customization and protective coatings. Available in gloss, matte, or textured finishes. CNC Machining, Sheet Metal, Injection Molding, 3D Printing Metals, Plastics, Wood
Tumbling
Tumbling
 Parts are polished in barrels or vibratory machines to remove sharp edges and improve surface uniformity. CNC Machining, Sheet Metal Metals, Plastics, Glass
Electropolishing
Electropolishing
 Electrochemical process that removes surface material for a smooth, shiny finish with improved corrosion resistance. CNC Machining Stainless Steel, Copper, Aluminum
Black Oxide
Black Oxide
 Chemical conversion coating that adds mild corrosion resistance and a sleek black appearance. CNC Machining, Sheet Metal Steel, Iron
Passivation
Passivation
 Acid treatment that removes free iron from stainless steel surfaces to enhance corrosion resistance. CNC Machining, Sheet Metal Stainless Steel, Corrosion-Resistant Alloys
SPI Mold Finish
SPI Mold Finish
 Standardized surface finishes for plastic molded parts, from glossy to matte, ensuring visual and functional consistency. Injection Molding Plastics
Electroless Plating
Electroless Plating
 Uniform metal coating applied chemically without electricity, even on complex geometries. CNC Machining, Injection Molding, 3D Printing Metals, Plastics
Teflon Coating
Teflon Coating
 Applies a PTFE-based layer to reduce friction and enhance chemical and corrosion resistance. CNC Machining, Sheet Metal, Injection Molding Metals, Plastics
Heat Treatment
Heat Treatment
 Thermal processing to modify hardness, strength, or ductility for enhanced mechanical performance. CNC Machining Metals
Alodine Coating
Alodine Coating
 Chromate conversion coating for corrosion resistance and paint adhesion. Common in aerospace parts. CNC Machining, Sheet Metal Aluminum, Aerospace Alloys
Electroplating
Electroplating
 Metal ions are deposited onto parts using electric current for enhanced appearance and protection. CNC Machining, Sheet Metal Metals
Electrophoresis (E-Coating)
Electrophoresis (E-Coating)
 Even, corrosion-resistant coating using electrically charged paint particles. Often used for automotive parts. CNC Machining, Sheet Metal Metals, Ceramics
Brushed Finish
Brushed Finish
 Linear polishing process that creates a uniform, directional satin texture. CNC Machining, Sheet Metal Metals
FAQs

FAQs About Surface Finishing

What is the purpose of surface finishing?
It enhances appearance, improves corrosion resistance, increases wear resistance, and optimizes the part’s performance for its intended application.
The best finish depends on your part’s material, intended use, environmental conditions, and desired appearance. We’ll recommend options that balance aesthetics, protection, and cost-effectiveness, and can provide finish samples for your review before production.
Yes — we can match Pantone or RAL colors, and provide samples for approval before production.
Some finishes add a thin layer that can slightly change dimensions. We account for this during manufacturing to maintain tolerances.
Yes — we can mask specific areas to apply finishes selectively.
We follow strict surface preparation, application, and inspection procedures to meet international standards.

Get the Finish Your Parts Deserve

From anodizing to painting and polishing, we perfect every detail. Share your design for a finishing-inclusive quote.

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