More importantly, anodised aluminium is more resistant to corrosion. The metal’s oxide layer is hard and self-renewing, thanks to its ability to spontaneously form a thin yet effective layer that is able to prevent further oxidation or corrosion. Weathering is also not a problem for anodised aluminium, and can withstand exposure even to carbon monoxide and carbon dioxide.
Any building can achieve a dash of colour without paint through having anodised aluminium. High quality ones can be found only from anodising companies in Birmingham, like Badger Anodising.