Earlier quoted context omitted.
They're beautiful. Good luck oxidizing any of that in normal environments, those scopes will outlast the people that built them. Old computer hardware used to be just like that, I would buy the boards by the pound in the 70's for parts. Gorgeous stuff.
Annoyingly the IC sockets tend to oxidise if the board doesn’t! I’ve lost count of the number of them I’ve had to replace in my life. If it wasn’t for mechanical switches, pots, contacts and some dubious thermal design I imagine the kit would last for 100 years easy. I have 40-50 year old stuff on my bench in daily use.
There are sockets with gold plated turned inner pins, those do not oxidize. Cost a pretty penny though.