Copper Amour Oxidised / Tools / Weapons

So all the Copper items expect the tools and amour are able to oxidised, which makes no sense really because if Minecraft wants to be accurate to reality then the amour/tools/weapons should be able to change colour due to oxygen over time.

 It should also allow the amour / tools / weapons to be able to be waxed ( items of tools and weapons to be done through an anvil ) while amour can be waxed / unwaxed when on a amour stand