Custom Surface Finishing Service

A part is only as good as its finish. Choose from 15+ surface finishing options to ensure your custom machined parts are high-performance, assembly-ready, and built to last.

Why Choose US for Surface Finishing?

We provides high-end surface finishing services with an uncompromising focus on quality and precision. We combine rigorous quality assurance with advanced engineering to deliver parts that perform as well as they look.

• Integrated Quality Control: We conduct rigorous adhesion tests, salt spray testing, and digital color analysis to ensure coating durability and aesthetic consistency.
• Precision Dimensional Accuracy: Our engineers account for coating build-up during the CNC programming phase, ensuring every part maintains perfect tolerances for seamless assembly.
• Advanced Inspection: We utilize precision thickness gauging to verify the integrity of every surface finish, ensuring optimal functional performance.

Surface Finishing FAQs

How do I choose the right surface finish for my machined parts?

Choosing the ideal surface treatment depends on your part’s environment. For indoor aesthetics, anodizing or bead blasting is often best. For harsh outdoor or industrial environments, we recommend hard anodizing (Type III), powder coating, or e-coating for superior corrosion resistance and durability.Does surface finishing affect the final tolerances of my components?

Yes, some processes add thickness. Chemical conversion coatings (like black oxide) or passivation have near-zero impact on dimensions. However, powder coating can add 50–100μm, and hard anodizing adds significant thickness. Our engineers factor these changes into the initial CNC machining stage to ensure perfect final fitment.Which surface finishes are best for aluminum CNC parts?

Anodizingis the most popular choice for aluminum, providing excellent wear resistance and color options. Other great options for aluminum include bead blasting for a matte texture and chromate conversion for electrical conductivity and corrosion protection.Can you match a specific brand color?

Absolutely. We offer powder coating, painting, and anodizing in a wide array of custom colors.What is the difference between “cosmetic” and “functional” finishes?

A cosmetic finish (like mirror polishing or PVD coating) focuses on the visual appeal and surface texture of the part. A functional finish (like passivation or electroless nickel plating) is designed to improve mechanical properties such as hardness, lubricity, or chemical resistance, where the final appearance is secondary.Which surface finishing processes have the shortest lead time for small-batch production?

For small-batch production, the fastest surface finishing processes are manual polishing/buffing, stainless steel passivation and manual spray painting—skip complex, long-curing processes like powder coating.

Surface Finish Capabilities

We offer 15+ surface finishing options tailored for custom components. From initial production to final surface refinement—ensuring your parts meet the most stringent functional and aesthetic standards.

A. Mechanical Finishes

Physical treatments to refine surface texture, eliminate tool marks, and enhance tactile quality.

Surface Finishes	Description	Compatible Materials	Service	Cosmetic Availability	Tolerances
Bead Blasting	Propels glass or ceramic beads to create a uniform matte or satin finish; ideal for removing tool marks.	Metals, Plastics	CNC & Die Casting	On Request	Negligible impact
Brushing	Creates a distinct directional grain texture on the surface for a high-end, industrial metallic look.	Metals	CNC Machining	Always Cosmetic	No impact
Polishing (Mirror)	Mechanical buffing with fine abrasives to achieve a highly reflective, mirror-like aesthetic.	Metals	CNC & Die Casting	Always Cosmetic	Met after process
Tumbling	A vibratory or barrel process used to smooth, debur, and clean high-volume batches of parts.	Metals, Plastics	CNC & Die Casting	Semi-cosmetic	Minimal edge radiusing
Smooth Machining	Utilizing high-precision tool paths and feeds to achieve superior surface smoothness.	Metals, Plastics	CNC Machining	No (Functional)	No impact

B. Chemical & Electrochemical Treatments

Surface chemistry modification for extreme corrosion resistance, hardness, and decorative coloring.

Surface Finishes	Description	Compatible Materials	Service	Cosmetic Availability	Tolerances
Anodizing (Type II)	An electrochemical oxide layer that provides decorative protection; available in various custom colors.	Aluminum, Titanium	CNC Machining	Excellent	Minor build-up (5-25μm)
Hard Anodizing (Type III)	Creates a thick, ceramic-like wear-resistant layer designed for high-friction industrial applications.	Aluminum	CNC Machining	Functional	Build-up (25-50μm)
Chromate Conversion	Also known as Alodine; provides a protective film while maintaining surface electrical conductivity.	Aluminum, Magnesium	CNC & Die Casting	No	No measurable impact
Passivation	A chemical treatment for stainless steel that removes surface contaminants to maximize rust resistance.	Stainless Steel	CNC Machining	No	No impact
Black Oxide	A chemical conversion that creates a sleek, matte black finish with excellent dimensional stability.	Steel, Copper	CNC Machining	Semi-Cosmetic	Zero build-up

C. Coating & Painting

High-performance protective layers designed for environmental shielding or branding requirements.

Surface Finishes	Description	Compatible Materials	Service	Cosmetic Availability	Tolerances
Powder Coating	A durable, heat-cured dry powder finish available in a massive range of colors and textures.	Metals	CNC & Die Casting	High (Decorative)	50-100μm build-up
E-Coating	Electrically applied paint that ensures 100% coverage and rust protection for complex die-cast parts.	Metals	Die Casting	Functional/Cosmetic	15-30μm build-up
Teflon (PTFE)	A specialized non-stick coating for parts requiring low friction, high lubrication, or heat resistance.	Metals	CNC Machining	Functional	Minimal build-up
PVD Coating	Vacuum deposition for ultra-hard, luxury metallic films in colors like Gold, Rose Gold, or Gunmetal.	Metals	CNC & Die Casting	Always Cosmetic	Ultra-thin (<5μm)

D. Plating & Specialized Marks

Electro-deposited metal films and precision marking for branding and functional enhancement.

Surface Finishes	Description	Compatible Materials	Service	Cosmetic Availability	Tolerances
Electroplating	Zinc, Nickel, or Chrome plating via electrolysis for enhanced hardness and superior corrosion protection.	Metals	CNC & Die Casting	Yes (Shiny/Matte)	5-15μm build-up
Laser Etching	High-precision laser marking for permanent logos, serial numbers, branding, or QR codes.	Metals, Plastics	CNC & Die Casting	Always Cosmetic	Zero impact

Enable Fast Mass Production Launch

Our full one-stop workflow supports you to kick off mass production efficiently.

1, Send Design Files Send your 2D/3D Drawings via email below, include material, finish, quantity

2, Get a Quote Quote provided with DFM to ensure manufacturability and cost-efficiency

3, Parts Production Once the quote is confirmed, production will start immediately

4, Inspection, Packaging & Delivery We inspect, pack, and ship your parts fast with lifetime support for peace of mind.

Start your precision project today. Send Email:service@jorenti.com your CAD drawings for a free DFM check & fast official quote. We support custom 5‑axis machining, mold parts and high‑precision components for robotics and optical communications.