If required the extrusion can then be anodised and/or chemically brightened.
When aluminium extrusions or components are polished, any blemishes such as die lines and scratches can be removed.
After polishing, an additional process of chemically brightening can produce a more reflective finish often used in highly decorative retail applications, bathroom, showers etc.
Polished components also include automotive trim, shop fittings and other retail interiors.