If you are specifying a decorative or architectural extrusion, the choice between brushed vs sandblasted aluminium profiles shapes the appearance, the maintenance cost and the price of every part you order. Both are mechanical finishes applied to the profile before anodizing, and both must be written on the drawing rather than improvised on the press.
How Brushed Finishes Are Produced
Abrasive belts and nylon wheels draw fine parallel lines along the length of the extrusion. The result is a directional satin sheen. Because the grain runs on one axis, brushing conceals shallow die lines while making any scratch that crosses the grain far more visible.
How Sandblasting Works
Fine abrasive media are projected onto the profile under pressure, creating an even, non-directional matte texture. Coverage is uniform across every face, which makes sandblasting far more forgiving on complex hollow sections, mitred corners and visible joints.
Appearance and Handling Compared
Brushed aluminium reads bright and reflective; sandblasted aluminium reads soft and matte. Blasted surfaces resist fingerprints and light scuffs noticeably better, while brushed surfaces show handling marks sooner and usually need a protective handling film through assembly.
Corrosion and Anodizing Performance
Both finishes anodize well, but the texture changes the outcome. A blasted surface scatters light, takes a deeper and more uniform colour, and its increased surface area gives the anodic layer a mechanical key. Brushed profiles keep a metallic highlight that many architects want. For outdoor service, specify anodizing thickness and seal quality separately, then confirm them with a salt spray test.
Choosing the Right Finish for Your Project
Choose brushed finishes for decorative trim, appliance and electronics housings where a bright metallic look supports the product. Choose sandblasted finishes for architectural frames, outdoor aluminium, handrails and any part that will be handled or cleaned often. Send us the drawing, the target finish and the exposure conditions, and we will confirm the process, the anodizing thickness and a physical sample before mass production.
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