# Finishes and Coatings for CNC Machined Parts

## Evaluate standard surface finishes for CNC machined parts as well as advanced capabilities to improve durability, surface finish, and add color.

**Certifications** ISO 9001:2015 | AS9100D | ITAR

## Standard Finishes

Choose from three standard surface finish options for CNC machined parts.

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#### Edges broken (tool marks visible)
Edges deburred with visible toolmarks.

**Materials**: Plastic, Metals  
**Cost**: $

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#### Edges broken and light bead blast
Edges deburred with light bead blast.

**Materials**: Metals  
**Cost**: $$

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#### Leave sharp (tool marks visible)
Edges left sharp (tool marks visible) should be handled with care.

**Materials**: Metals  
**Cost**: $

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### CNC Machining Services for End-Use Parts
Get high‑quality machined parts faster with our expanded automated CNC milling—parts ready in as fast as 4 days  
[Get a Quote](/content/ecom/get-a-quote/ "Get A Quote"/index.html)

## Coating and Plating Options

Choose from a variety of coating and plating options for CNC machined parts.

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#### Anodizing Type II

**Anodize Type II Black**

**Anodize Type II Blue**

**Anodize Type II Clear**

**Anodize Type II Gold**

**Anodize Type II Red**

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#### Anodizing Type III

**Anodize Type III Black**

**Anodize Type III Blue**

**Anodize Type III Clear**

**Anodize Type III Gold**

**Anodize Type III Red**

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#### Powder Coating

**Black Flat Smooth (Raven Black)**

**Safety Orange**

**Black Flat Fine Textured (Black Grey RAL 7021)**

**Black Flat Smooth**

**White Gloss Smooth (Signal White RAL 9003)**

**White Gloss Smooth (Sky White)**

**Tan Flat Smooth (Desert Tan)**

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#### Chromate Plating

**Type I Class 1A Clear Chromate Plating**

**Type I Class 3 Clear Chromate Plating**

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#### Electroless Nickel Plating

**Clear Electroless Nickel Plating**

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#### Zinc Coating

**Yellow Zinc Plating Type II**

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## Advanced Post-Processing Options for CNC Machining Parts

Through both the Factory and Protolabs Network, you can access a broad range of post-processing capabilities to meet your part’s specifications.

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|  | **Description** | **Materials** | [Factory](/content/ecom/get-a-quote/ "Get A Quote"/index.html) | [Network](https://www.hubs.com/manufacture/?technology=cnc-machining) |
| --- | --- | --- | --- | --- |
| **Bead Blasting** | Light bead blast to provide uniform finish and light texture | Metals | ✔ | ✔ |
| **Anodizing** | Type I, II, and III finishes are available to improve part durability and add color | Aluminum<br>Titanium | ✔ | ✔ |
| **Chromate Coating** | Improve corrosion resistance, add electrical connectivity, and the ability to better paint parts | Metals | ✔ | ✔ |
| **Electroless Nickel Plating** | A wear-, abrasion-, and corrosion resistant finish that is compatible with aluminum, stainless steel, and mild steel | Aluminum<br>Steel | ✔ | ✔ |
| **Part Marking** | Laser engraving or pad printing to add labeling and other text to parts | Metals<br>Plastics | ✔ | ✔ |
| **Passivation** | Enhance durability and corrosion resistance of metal parts | Metals | ✔ | ✔ |
| **Powder Coating** | Add custom color to parts while improving durability | Metals | ✔ | ✔ |
| **Inserts** | Incorporate off-the-shelf hardware components to facility assembly | Metals | ✔ | ✔ |
| **Silk Screening** | Add design elements or labels to parts | Metals |  | ✔ |
| **Brushing** | Achieve uniform, satin-like surface finish | Stainless Steel |  | ✔ |
| **Polishing** | Create mirror-like finishes on metal parts | Metals |  | ✔ |
| **Black Oxide** | Improve corrosion resistance | Metals |  | ✔ |
| **Brushed + Electropolishing** | This combination of processing results in easy-to-clean parts that are corrosion resistant | Metals |  | ✔ |
| [**Micro-finishing**](https://www.hubs.com/surface-finishing-services/micro-finishing-ra-0.4%ce%bcm/) | Micro-finishing achieves Ra 0.4 μm surface roughness for reduced friction, improved sealing, and a high-quality finish. | Metals |  | ✔ |
| [**SurTec 650**](https://www.hubs.com/surface-finishing-services/surtec-650-services/) | SurTec 650 is a chromium-free aluminum coating that improves corrosion resistance while maintaining dimensional accuracy in demanding conditions. | Aluminum |  | ✔ |

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