Its greatest upside is its top-notch corrosion resistance, which is a result of either one or both of two processes: the natural formation of a protective oxide coating on its surface when exposed to air, or an industrial aluminium polishing process, courtesy of companies such as Badger Anodising. The polishing process also allows aluminium to be offered in a variety of colours that better suit specific purposes, reducing the need for using paint. Furthermore, aluminium is incredibly durable yet very lightweight, allowing for maximum signage longevity even in tough weather conditions.
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