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6 Types of Finishes To Consider for Your Aluminum Extrusions

June 23, 2023

Aluminum extrusions can make a big difference in the look and feel of your project, and choosing the right finish for these components is just as important. You can apply various finishes to aluminum extrusions, whether you want a high-luster look or something matte.

Learn about the six types of finishes to consider for your aluminum extrusions and what each offers for your project.


Anodizing is an excellent finish for aluminum extrusions because it is durable and protects against oxidation. It involves immersing the aluminum in an acid solution and applying electricity to it, resulting in a surface coating. This coating is highly resistant to wear and tear, making it a great choice for outdoor applications. It also comes in a variety of colors, from light gray to black.

Powder Coating

Powder coating is another popular finish for aluminum extrusions because it is highly durable and can resist scratches and other types of wear better than anodizing. The process involves spraying a colored powder onto the aluminum and curing it at high temperatures. The powder bonds to the aluminum, forming a strong finish that won't come off easily. Powder coating is available in various colors, from metallic gray to matte black.


Electropolishing is a special finishing process that polishes aluminum extrusions to give them a sleek, luxurious look. The process involves using electricity to remove impurities and create a smooth surface on the aluminum. It usually works well with anodizing or powder coating for added protection and shine. This finish is especially popular in industrial settings where aesthetics are paramount.

Chrome Plating

Chrome plating is another popular finish for aluminum extrusions because it creates a bright, reflective surface. This process involves electroplating the aluminum with a thin chrome layer and buffing it to enhance the shine. Manufacturers can chrome plate materials alone or with other finishes, such as powder coating or anodizing, to create a unique look.

Brushing or Sandblasting

Brushing or sandblasting gives aluminum extrusions a textured look. This process involves using an abrasive material, such as sandpaper or steel wool, to create grooves on the surface of the aluminum. The result is a slightly rough texture that can add interest and contrast to your project. Sandblasting also gives aluminum a matte finish, which can look great in modern settings.


Painting is another popular option for finishing aluminum extrusions. This process involves applying paint to the surface of the aluminum and curing it at high temperatures. Painting is especially great if you're looking for a bespoke look or want to match specific colors in your project. You can also choose from various finishes, from glossy to matte.

The Purpose of Aluminum Extrusions

No matter what finish you choose for your aluminum extrusions, they will provide an appealing look to your project. Aluminum extrusions can be strong and lightweight while offering various features tailored to your needs. Aluminum extrusions can enhance the look and performance of any project, thanks to the various options available.

These parts are perfect for creating frames, supports, and other structures requiring reliable material. Aluminum extrusions are also resistant to corrosion and weathering, making them ideal for outdoor use. By choosing the right finish for your aluminum extrusions, you can ensure they last for years.

Things To Consider When Choosing a Finish for Your Aluminum Extrusions

When choosing a finish for your aluminum extrusions, it's important to consider the type of project you're working on and what finish will best meet your needs. You should also think about how much wear and tear the aluminum will be subjected to. Finally, take into account any environmental factors that may affect the finish, such as humidity or temperature. By considering all these things, you can decide which finish is best for your aluminum extrusions.

Why Aluminum Extrusions Are So Popular

These extrusions are common in homes and businesses because of their durability, strength, and affordability. Let's look at a few reasons why aluminum extrusions are so popular.


One of the primary reasons aluminum extrusions are so popular is because of their versatility. They can work in almost any application, from simple frames to intricate designs. Aluminum is malleable but strong, which makes it excellent for creating extrusions that can withstand wear and tear.


Another reason why aluminum extrusions are so popular is their lightweight properties. They are significantly lighter than most metal parts, so they are ideal for applications where weight is a key factor. For example, aluminum extrusions are common for building lightweight aircraft, automobiles, and even bicycles.

Corrosion Resistance

Aluminum also has exceptional corrosion-resistant properties, making this metal perfect for items exposed to harsh outdoor or marine environments. This property can add a layer of protection to structures or products that may otherwise be vulnerable to rust or corrosion.

Easy To Fabricate

Aluminum extrusions are also easy to fabricate, which is a significant reason for their popularity. Manufacturers can easily shape, cut, and form aluminum, which enables them to customize designs with minimal effort.


Finally, T-slot aluminum connectors are sustainable options. You can easily recycle them at the end-of-life stage, making them environmentally friendly materials. This property is becoming increasingly important due to great concerns about climate change and sustainability.

Various options are available when choosing a finish for your aluminum extrusions. From anodizing and powder coating to chrome plating and painting, you'll be able to find a finish that's perfect for your project. No matter what type of finish you choose, it's important to consider all the factors that will impact the components' durability and longevity. By taking your time to find the right one, your aluminum extrusions will look great for years.

A-Line Automation has aluminum extrusions and connectors in various sizes, shapes, colors, and finishes to meet any project's needs. We're here to help you create the perfect aluminum extrusion solution for your unique application. Contact us today to learn more about our products and how we can help you find the ideal finish for your project.

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