I dug a heavily tarnished silver three cent, with a slight bend in it. It wasn't worth much, so I decided I would rather have it looking silvery, but I was scared of damaging it. So I took it to a coin shop. He took a look at it and said, Oh, I'm sure I can straighten that out for you, too! Put it on the counter, pressed with his finger, SNAP. I have it in a nice case now and you can't really tell it's broken. And to his credit, he gave me a better condition silver 3 cent from his shop at no charge. Still mad about that though.