Efficient & Stable Surface Finishing Services
We provide on-demand custom CNC machining services, covering turning, milling, EDM, wire-cutting and other processes. We produce precision metal and plastic parts from prototype to mass production.
We provide full-range CNC part surface finishing solutions, delivering reliable rust prevention, wear resistance, insulation, corrosion protection and aesthetic optimization. We customize appearance and performance for precision metal and plastic components, catering to industrial, medical, automation and aerospace applications.
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Representative CNC machined parts we support
Zhonghanda reviews substrate, critical dimensions, appearance needs and finishing requirements together so material selection supports the final application.
Aluminum
Aluminum
Chemical oxidation options including anodizing, chromate conversion and black oxide
Request a QuoteFinish Plan
Process control
Masking
Critical surfaces
Video QC
Shipment evidence
99.2%
Quality acceptance
What is Surface Finishing?
Material + environment + tolerance + appearance
Surface finishing is a process that forms functional or decorative coatings on the surfaces of various components (such as metal and plastic) through physical, chemical, or electrochemical methods.
We operate our own independent surface finishing factory, offering over 50 customized finishing types to deliver one-stop solutions spanning CNC machining to professional surface treatment. Equipped with dual expertise in precision machining and surface finishing, we enable optimal matching of workpiece materials and finishing processes, effectively cutting production costs, streamlining workflows and accelerating order delivery for customized components. We provide tailored surface treatment solutions based on your product operating environment, functional requirements and aesthetic standards, along with free professional process consultation and accurate quotations.
In-house finishing stack
50+ finishing routes selected as a complete layer system, not a decorative afterthought.
Why Surface Finishing is Essential?
Professional CNC surface finishing upgrades functional performance, optimizes visual aesthetics, improves assembly compatibility, and boosts component durability, empowering custom metal and plastic parts to deliver stable performance in complex industrial scenarios，making it a critical step from component forming to finished products.
Selected finishing objective
Performance Upgrade
Enhances wear resistance, rust prevention, corrosion resistance, insulation, and high-temperature resistance.
Surface Finishing We Offer
Choose by function, not by process name
Compare material compatibility, coating behavior, protection level, cost and best application before opening the complete technical record.
20
Processes
4
Families
Texture and appearance
Mechanical finishing routes that control texture, gloss, preparation quality and identification.
Selected process record
Sand Blasting
Sandblasting: A high-pressure airflow propels fine abrasive particles to impact the workpiece surface, removing mill scale, machining marks, and burrs to create a uniform matte, frosted finish.
Applicable materials
Suitable for all metal materials
Surface color
Uniform Matte-Frosted Gray finish; the surface is fine and smooth, free of machining marks
Creates a smooth surface finish, provides a matte aesthetic, and significantly improves the adhesion of subsequent electroplating, painting, or anodizing treatments.
- Corrosion Resistance
- Level 11/5
- Wear Resistance
- Level 11/5
- Surface Roughness
- Level 22/5
- Cost Level
- Level 11/5
Best application
Component surface pre-treatment, decorative exterior parts, non-standard mechanical exterior components
Disadvantages
When used in isolation, it provides no corrosion resistance or abrasion resistance.
Extremely versatile, provides excellent surface enhancement, and is compatible with all downstream processing steps;
Material Compatibility Instructions
Many customers are unsure which surface treatment processes are suitable for different steel and aluminum materials. Below are the application recommendations for some common materials.
Material
Aluminum alloy
Suitable Surface Treatment Process
Common appearance color differences & quality standards
We implement strict standardized quality control for all CNC surface finishing procedures. Every custom part finishing process follows unified factory specifications on color consistency, surface gloss and appearance tolerance. Our strict metal surface treatment quality standards eliminate unstable finishing defects, ensuring uniform, durable and aesthetic surface effects for all precision machined components.
Selected release standard
Standard color range of each finishing
Every CNC surface finishing option, including anodizing, phosphating, sandblasting, electroplating and powder coating, complies with unified factory color standards. We strictly control base material conditions, solution concentration, processing temperature and treatment duration to deliver consistent color tones and qualified surface effects for all custom machined parts.
Surface Finishing Case Presentation
View more CNC surface finishing project cases, contact us for customized solutions.
Anodizing
Anodized aluminum housing for automation equipment, featuring uniform color, superior wear and corrosion resistance with precise dimensions for industrial assembly.
Efficient & Stable Surface Finishing Services Articles
Read recent technical articles related to this service before preparing your RFQ.
cnc
CNC for Complex Metal Housings: What Buyers Should Know
1. Why CNC matters for complex metal housings 2. What the part tells you about the manufacturing route 3. Key features buyers should evaluate 4. Why cast-and-machined aluminum is so common 5. Selection criteria that actually help 6. Practical buyer cautions 7. What to ask before you place an order 8. Next step
cnc
CNC Machining for Cast Aluminum Housings: What Buyers Should Check
1. Why CNC machining matters for cast aluminum housings 2. What this kind of part is designed to do 3. Why high-pressure die casting is often paired with CNC machining 4. Key features buyers should evaluate 5. Common mistakes when sourcing this type of housing 6. What to ask a supplier before ordering 7. How this connects to real buyer decisions 8. FAQ: quick buyer questions 9. Next step
cnc
CNC Machining for Complex Cast Housing Parts
1. Why CNC machining matters on a complex cast housing 2. What buyers should look for first 3. How the casting and machining stages work together 4. Common sourcing mistakes with machined cast housings 5. Practical selection advice for engineering and procurement teams 6. FAQ: a few questions buyers usually ask 7. What to do next
cnc
CNC Machining for Cast Industrial Housings: What Buyers Should Check
1. Why CNC matters on cast housings and functional bodies 2. What this type of part is trying to achieve 3. Quick buyer takeaway: what to check before you approve the part 4. Why cnc machining is the critical step 5. Design and sourcing criteria that matter most 6. Common mistakes buyers still make 7. Practical questions to ask a supplier 8. Next step
What is the difference between anodizing and powder coating?
Is phosphating suitable for 4140 steel parts?
Which surface finish is best for corrosion resistance?
Will surface finishing affect part dimension tolerance?
What surface finish is best for moving mechanical parts?
Can different surface finishes be applied to the same part?
Why do finished metal parts show color deviation?
Does stainless steel require surface finishing?
Elevate Your Product's Surface Performance
Our in-house workshop offers 50+ professional CNC surface finishing options and integrated one-stop CNC machining & metal surface treatment services. Leveraging dual expertise in precision manufacturing and custom part finishing, we match optimal surface processes for diverse materials to reduce costs, shorten lead times and enhance quality, providing tailored custom surface treatment solutions with free consultation and precise quotations.