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<p>[QUOTE=&quot;TheFinn, post: 8445013, member: 90102&quot;]Rust is a form of oxidation. It is limited to iron and steel.</p><p>Rust is more damaging because it can flake off and expose new metal.</p><p>Aluminum makes a protective coating that is thin and allows the metal to be seen through it without any color change. It forms instantly.[/QUOTE]</p><p><br /></p>

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