2001 D possible error or damage? And 1972 gold looking Lincoln cent. Help!

2001D Not sure what this is...any help would be appreciated. Has a steel appearance, but not magnetic so it leads me to believe the copper coat has flaked off. Sounds like a steel penny when dropped. The coin is convex like its been hit or pressed to be that way. Not sure what's going on here.

1972 Lincoln - This coin has a strange finish as well as color. Its extremely shiny and gold like. I have a 1987 D with a similar color pictured with the 72 so maybe not as unique as I think. Thoughts?

Other coins are pictured for comparison. Thanks

 

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2001 - Deplated... you are seeing the Zinc without the Copper Plating
1972 - Plated

Post Mint Damage both Cents

 

That's what I was thinking as well. Just wanted some more information. Thanks!