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The use of coatings helps to protect the items they are used on. Thus coatings contribute to better durability of such products, saving our natural resources. Coatings help extend the life of these materials, which in turn leads to saving energy in the production of such items. Coatings perform a positive environmental function in protecting and decorating surfaces. They are used to preserve timber and enable us to use less precious hardwoods and replace them with renewable-forest soft woods, which would otherwise be unsuitable for construction purposes. Coatings also save valuable metals like steel and aluminium, and the fuel needed to make them, by preventing corrosion.