I received this as a gift from a very dear friend who has recently been diagnosed with a terminal illness. It was in excellent condition when I got it, and she restored it herself. It holds a lot of sentimental value to me for obvious reasons.

I'm afraid I have not been treating it well. Today, I examined it and noticed rust forming on the outside of the barrel where there wasn't any before, and I've been storing it vertically which I just read is damaging to the wood on the stock. This is as far as I know how to break it down, and now I'm a little hesitant to clean it for fear of damaging it further. Can anyone recommend resources or advice on how to ID and maintain it? The most I have is that it's likely an American Arms Big Boy.

Thank you in advance

I got an old parker bros side by side shotgun with a missing right side hammer does anyone know where I can get a replacement hammer? Or a hammer from another gun that will work with it.