Custom Surface Finishing Services

Improve Appearance, Durability, and Corrosion Resistance

Our surface finishing services protect metal parts and enhance their appearance. We provide powder coating, anodizing, spray painting, polishing, brushing, galvanizing, and sandblasting to meet functional and cosmetic requirements across industrial, automotive, and consumer applications.

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What Is Surface Finishing?

Surface finishing is the final treatment applied to metal parts after cutting, machining, or welding. It improves corrosion resistance, wear resistance, electrical insulation, adhesion, and appearance. The right finish depends on the material, operating environment, and design requirements.

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Finishing Processes

50–150 µm

Powder Coating Film

RAL · Pantone

Color Matching

Corrosion Resistance

Wear Resistance

Electrical Insulation

Adhesion

Appearance

Final Treatment

Welding Processes

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03

04

05

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Powder Coating

Steel, stainless, aluminum — 50–150 μm, RAL / Pantone / custom colors.

Anodizing

Aluminum — 5–25 μm (Type II); hardcoat Type III thicker. Clear, black, colors.

Spray Painting

Most metals — 25–100 μm, custom colors.

Polishing

Stainless, aluminum, brass — mirror or satin finish.

Brushing

Stainless, aluminum — satin directional texture.

Sandblasting

Most metals — matte surface, oxide removal, pre-finish.

Galvanizing

Steel — corrosion protection, silver-gray.

Passivation

Stainless steel — restores corrosion resistance, no color change.

How to Choose the Right Finish

Powder coating, anodizing, painting, polishing, galvanizing, and more.

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Requirement	Recommended Finish
Outdoor corrosion protection	Powder coating, galvanizing
Wear resistance	Hardcoat anodizing, powder coating
Cosmetic / decorative	Polishing, brushing, anodizing
Electrical insulation	Anodizing (aluminum)
Pre-treatment before painting	Sandblasting, phosphating
Medical / food hygiene	Passivation, electropolishing

Materials We Finish

Material	Common Finishes
Aluminum	Anodizing, powder coating, painting, polishing
Steel / Carbon Steel	Powder coating, painting, galvanizing
Stainless Steel	Passivation, polishing, brushing, powder coating
Brass / Copper	Polishing, plating, lacquering

Typical Welded Assemblies

Finished Assemblies 2

Finished Assemblies

Industries We Serve

Finishing Specifications

Angles, flange lengths, and hole positions are held to standard tolerance on every run — measured on the first piece and sampled throughout production.

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Powder Coating

50–150

µm

Film Thickness

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Anodizing Type II

5–25

µm

Film Thickness

03

Hardcoat Anodizing

25–100

µm

Film Thickness

04

Galvanizing

ASTM A123

Reference Standard

Quality Control for Surface Finishing

Every order passes six inspection checkpoints — from surface pretreatment verification to final visual inspection — so the finish meets the agreed specification.

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Step 01

Surface Preparation Check

Surface cleanliness and pretreatment are verified before any coating is applied.

Step 01

Step 02

Coating Thickness Measurement

Dry film thickness is measured with a DFT gauge to confirm the specified range.

Step 02

Step 03

Color & Gloss Check

Color and gloss are checked against the agreed standard.

Step 03

Step 04

Adhesion Test

Adhesion is tested with a tape test or cross-cut method.

Step 04

Step 05

Salt Spray Test

Salt spray testing is available on request for corrosion validation.

Step 05

Step 06

Final Visual Inspection

Every part receives a final visual inspection for defects before packing.

Step 06

Why Global Buyers Choose Golift as Their Metal Fabrication Partner

We are a direct custom metal fabrication factory in China — not a trading company. With advanced production equipment, skilled engineers and strict quality control, we deliver reliable, cost-effective and customized metal solutions from prototype to mass production.

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