The only part that really deteriorates is the rubber gasket, which needs to form a seal to keep steam from escaping. Should be able to order a replacement gasket of the same size.
The rest is just mostly thick metal and can be cleaned appropriately.
Probably about a 30 minute job to restore it, I’m thinking? Assuming you can just soak it in some CLR or something. (a common commercial de-scaling and rust-removal product)
Nobody should be ashamed of the history of their people. That encourages some to hide from it. Instead one should not shy away, but try to study and learn from the mistakes of their forebears, so their children might get a better world someday.
Shame for something you yourself have not done, though? Pointless.