From concept to product
From prototyping to production, our production sites can handle all your manufacturing projects.
Surface Finishing
At SOMI Custom Parts, we offer comprehensive surface finishing solutions including powder coating, electroplating, anodizing, polishing, and spray painting. Our finishing processes enhance durability, appearance, and performance of your custom-manufactured parts. Every finish is tailored to your specific requirements — no standard packages, only bespoke solutions. A full spectrum of finishing services to meet your aesthetic and functional requirements. Professional liquid spray painting with custom color matching, including primer, base coat, and clear coat applications. Zinc, nickel, chrome, and gold plating for enhanced corrosion resistance, wear protection, and decorative appearance. Type II and Type III hard anodizing for aluminum parts with improved surface hardness and wear resistance. Durable electrostatic powder coating in hundreds of RAL colors with excellent impact and UV resistance. Mechanical polishing and vibratory finishing for mirror-like surfaces, achieving Ra 0.1 micron surface roughness. Our finishing expertise is backed by years of experience across thousands of custom projects. We perform adhesion, thickness, hardness, salt spray, and UV testing in our own quality lab. From raw part fabrication to final finishing, we handle everything under one roof — no subcontracting. Pantone, RAL, or custom color matching supported across all painting and coating processes. Environmentally compliant finishing lines with VOC capture, water treatment, and waste reduction. Quality management system with strict quality gates at every finishing stage. Free finish samples within 3-5 days for color and texture approval before production. Meticulous process control ensures consistent, high-quality results on every part. Degreasing, blasting, or etching Chemical conversion or passivation Controlled process and thickness Temperature controlled curing Visual and performance testing Our finishing services support critical applications across diverse industries. Chrome plating, black oxide, and powder coating for engine components and interior trim. Biocompatible passivation, electropolishing, and medical-grade coating for surgical instruments. Hard anodizing and MIL-SPEC coatings for critical flight components. Powder coating, zinc plating, and anti-corrosion treatment for machinery and outdoor equipment. Tell us your material, application, and finish requirements. We'll recommend the optimal surface treatment and provide a free sample.
Professional Surface Finishing Services — Perfecting Every Custom Part
Our Surface Finishing Capabilities
Spray Painting
Electroplating
Anodizing
Powder Coating
Polishing & Buffing
Why Choose SOMI for Surface Finishing
In-House Lab Testing
One-Stop Solution
Custom Color Matching
Eco-Friendly Processes
ISO 9001 Certified
Fast Sampling
Our Surface Finishing Process: From Raw Part to Perfect Finish
Surface Preparation
Pre-Treatment
Finish Application
Curing & Drying
Quality Inspection
Industries We Serve with Surface Finishing
Case Study
Automotive
Case Study
Medical Devices
Case Study
Aerospace & Defense
Case Study
Industrial Equipment
Need a Specific Surface Finish for Your Parts?
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Electroless plating is a chemical-based metal coating process that relies on autocatalytic reactions to deposit a uniform layer of metal—no electricity required. It’s perfect for complex geometries and non-conductive substrates like plastic or ceramics.
Phosphating is a chemical conversion treatment that produces an insoluble phosphate crystal layer on metal surfaces. It enhances corrosion resistance, improves paint adhesion, and adds lubricity. Common in automotive, machinery, appliances, and military applications, it serves as an essential base for further surface coatings.
Powder coating services is a high-performance surface finishing technique that applies dry powder to metal or plastic components using electrostatic attraction. Once cured under heat or UV light, it forms a tough, uniform layer that resists corrosion, scratches, and fading—while offering vibrant color and texture options.
Anodizing is an electrochemical process that enhances metal surfaces by forming a controlled oxide layer. It improves corrosion resistance, wear durability, and visual appeal—especially for aluminum components.
Blackening (black oxide treatment) is a chemical conversion process that produces a sleek black surface on metal parts. It improves corrosion resistance, maintains precision dimensions, and enhances appearance.
Electrophoretic coating, or E-Coating, is a high-performance surface treatment that uses electrical current to deposit paint particles onto metal parts
Electroplating is a surface finishing technique that uses electrolysis to deposit a metal coating on various substrates. It enhances surface properties such as corrosion resistance, conductivity, durability, and aesthetic appeal.
Anodizing is an electrochemical process that thickens the natural oxide layer on aluminum, creating a hard, corrosion-resistant surface. Powder coating is a dry painting process where electrostatically charged powder is sprayed and cured under heat. Anodizing is thinner and preserves dimensional accuracy; powder coating offers thicker, more impact-resistant coverage. Selection depends on your material, application environment, performance requirements, and aesthetic goals. Our engineering team provides free consultation — simply share your part specifications and we'll recommend the optimal finish. Yes. We support RAL, Pantone, and custom color matching across all our painting and coating processes. We can match any color sample you provide and offer finish samples for approval before production. Through mechanical polishing and buffing, we can achieve surface roughness as low as Ra 0.1 micron (mirror finish). Standard machined finishes range from Ra 0.4-1.6 micron. We verify with measurement equipment. Yes. We offer stripping, media blasting, and chemical removal of existing coatings before applying new finishes. This ensures proper adhesion and a clean, defect-free result. Beyond surface finishing, SOMI offers a full suite of precision manufacturing services to meet all your custom part needs under one roof. Contact us for a free surface finishing consultation. We'll discuss your requirements and recommend the optimal solution with a quick turnaround quote.
Frequently Asked Questions About Surface Finishing Services
What is the difference between anodizing and powder coating?
How do I choose the right surface finish for my parts?
Do you offer color matching for painting and coating?
What surface roughness (Ra) can you achieve?
Can you finish parts that have been previously coated?
Explore Our Comprehensive Manufacturing Capabilities
Ready to Perfect Your Parts?
From concept to product
From prototyping to production, our production sites can handle all your manufacturing projects.
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