

I'm thinking about restoring the visible parts of the old plumbing in my bathroom, it looks original, adds a bit of character to a place that would look sterile with a modern aesthetic and it appears to be in good condition. It looks like the seal has gone, I don't know how to replace it or if it's still available but I want to strip back the cast iron and paint it properly and restore the copper lines to their original state, ideally leaving them raw and just putting a clear coat over the top of them. How do I do this and what products?
I won't be calling in a plumber the copper lines I'll be doing while still installed but I will probably take the P trap out because it's in an awkward position to work on and could do with a good clean out.

Also can anyone identify the manufacturer and tell me anything about this part?