Provide efficient production and faster design to delivery.


Produce precision parts that exceed industry standards.


Create and test products quickly to bring them to market.

Consumer Products

Bring new, affordable products to market faster.


Empower to innovate faster, maximizing performance.


Innovation in enclosures for low-volume production.

Industrial Equipment

Deliver machinery that beats the competition.

New Energy

Speed up innovation and development.

Medical Devices

Build prototypes and products that adhere to medical safety.


Improve efficiency with precise, fast, and constant part quality.


Drive time-to-market through on-demand production.

CNC Machining for Aerospace

The extremely high level of precision needed within the aerospace industry makes CNC machining a suitable manufacturing process for the sector.


This article provides you with a complete guide to aerospace machining and its importance.



Gain valuable insights into manufacturing processes.

Knowledge Base

Whitepaper, design guide, materials, and finishing.

Case Studies

Learn successful stories to inspire your project.


Improve manufacturing know-how with our eBooks collection.


Discover our library of educational videos.

Surface Finishes

Select from 30+ surface finishing options.


Choose from 50+ metals and plastics for your project.

CNC Machining eBook

If you want to produce high-quality machined parts with a sleek appearance, it’s essential to consider some critical factors related to CNC machining. 


Here, we’ve gathered some basic information and important considerations to help you achieve the desired results.

About RapidDirect

Our vision, mission, development history, and dedicated team.


Real feedback on experiences and opinions of our services.


Company news, platform updates, holiday announcement.

Our Platform

Get instant quotes with our smart online platform.

Our Capabilities

Rapid prototyping, and on-demand production.

Quality Assurance

Deliver quality parts that meet requirements and exceed expectations.

Contact Us

Online Quotation Platform v3.0

Attention! We have exciting news to share with you. We have just launched the latest online platform, version 3.0! 



The updated platform boasts a fresh and intuitive design, along with enhanced functionality that streamlines and accelerates the quoting process, like a new manufacturing process, streamlined quoting summary page, and improved checkout page. 

Finishing Services

High-quality surface finishing services improve your part’s aesthetics and functions regardless of the manufacturing process used. Deliver quality metal, composites, and plastic finishing services so you can bring the prototype or part you dream of to life.  

Our Portfolio of Surface Finishing

Our part finishing services are exceptional as our teams are experts in plastic, composite, and metal surface finishing. Furthermore, we have state-of-the-art machines and infrastructure to bring your idea to life.  

as machined

Coming out of the machine after processing, our parts are cleaned of any sharp edges and burrs while retaining marks. With no added materials, the finish gives parts a surface roughness of 3.2 μm (126 μin).

As machined

bead blasting

Bead blasting cleans the surface of any impurities and peels coating through the propelling of blast media streams over the parts.

Bead blasting


To increase surface hardness and dissipate heat, we use anodizing techniques to enhance the look of parts and blend well for painting and priming.



Electroplating reduces metal cations in the electrolyte solution, producing a metallic coating on a metal surface. This process can be used for purposes of corrosion and wear resistance, as well as for decorative purposes.



Working on metal and hard plastics, our polishing uses highly efficient machinery to get our parts between Ra 0.8~Ra0.1 for a cleaner surface.


powder coating

We apply a thin layer of protective polymer with the corona discharge phenomenon to give our part a lasting finish that protects from impacts and prevents wearing down.

Powder coating


Our brushing technique uses abrasive belts over the material to create diverse patterns that match the parts’ structure and color.



Spray droplets can be dispersed uniformly or in fine amounts to cover a wide surface area and bring out greater color to the part.


black oxide

Adding layers to metallic surfaces like steel, our black oxide technique improves appearance while maintaining durability.

Black oxide


We use chromate conversion coating or alodine to protect aluminum and other materials from corrosive elements, usually done before priming and painting parts.


part marking

Helpful in brand recognition or parts organization, we use part marking that applies various printing methods during full-scale production to quickly embed barcodes, lettering and logos on the parts,

Part marking

Our Surface Finishing Specifications

Part surfacing finishing techniques can either be for functional or aesthetic purposes. Each technique has requirements, such as materials, color, texture, and price. Below are the specifications of the plastic finishing techniques rendered by us.

Name Description Materials Color Texture Price Link
P04 2 S02 as machined As-machined The standard finish for our parts, the “as machined” finish, has a surface roughness of 3.2 μm (126 μin), which removes sharp edges and deburs parts cleanly. All materials n/a Stain $ /
bead blasting 1

Bead Blasting

Bead blasting is the process of powerfully propelling, generally with high pressure, a stream of blast media against a surface to remove unwanted coating layers and surface impurities.

Aluminum, Steel, Stainless Steel, Brass, Copper

n/a Matte $ Learn More>>
surface finish anodizing Anodizing Keeping our parts in the long term, our anodizing process resists corrosion and wear. It’s also an ideal surface treatment for painting and priming, and it looks great too. Aluminum

Clear, black, grey, red, blue, gold

Smooth, matte finish


electroplating Electroplating Electroplated coating preserves the surface of parts and resists rusts and other defects from causing decay by applying electric currents to reduce metal cations.

Aluminum, steel, stainless steel

Gold, silver, nickel, copper, brass

Smooth, glossy finish


polishing Polishing

Ranging from Ra 0.8~Ra0.1, polishing processes use an abrasive material to rub the part’s surface to make the shine more less shiny, depending on your requirements.

All materials


Smooth, glossy finish


powder coating

Powder Coating

Using corona discharge, we make the powder coating adsorbed to the part, creating a more wear-resistant layer with a typical thickness ranging from 50 μm up to 150 μm.

All metal materials

Custom Glossy


CNC machining surface finish Brushing


Brushing is a surface treatment process in which abrasive belts are used to draw traces on the surface of a material, usually for aesthetic purposes.

ABS, Aluminum, Brass, Stainless Steel, Steel

n/a Satin


surface finish painting


Painting involves spraying a layer of paint onto the surface of the part. Colors can be matched to a Pantone color number of the customer’s choosing, while finishes range from matte to gloss to metallic.

Aluminum, Stainless Steel, Steel

Custom Gloss, semi-gloss, flat, metallic, textured


P04 2 S02 black oxide

Black Oxide

Black oxide is a conversion coating similar to Alodine that is used for steel and stainless steel. It is used mainly for appearance and for mild corrosion resistance.

Steel, Stainless Steel

Black Smooth, matte



alodine rapiddirect


Chromate conversion coating, more commonly known by its brand name Alodine, is a chemical coating that passivates and protects aluminum from corrosion. It is also used as a base layer before priming and painting parts.


Clear, Gold Same as before



P04 2 S02 part marking

Part Marking

Part marking is a cost-effective way to add logos or custom lettering to your designs and is often used for custom part tagging during full-scale production.

All materials

Custom n/a



surface finishing ebook banner
Surface Finishing Whitepaper
There are different types of finishing options for metal and plastic and prototypes and parts. Not knowing the appropriate finishing for your products would cause undesirable results. Our eBook on surface finishing helps you choose the proper finishing for your products.

Gallery of Parts With Cosmetic Surface Finish

Get a feel of our quality-focused custom parts made using precision surface finishing techniques.

See What Our Customers Say About Us

A customer’s words have a more substantial impact than a company’s claims – and see what our satisfied customers have said regarding how we fulfilled their requirements.

Work With Various Industrial Applications

We have been developing a number of rapid prototypes and low-volume production orders for customers in multiple industries ranging from automotive, aerospace, consumer goods, medical devices, robotics, and more.



Consumer Goods

Medical Devices


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