I did a project on some prewar trains for a coworker. We were talking about trains and he said he had some from when he was a kid but were rusty and junk. I told him I look at them and see what I could do. Turn out it was a 252 freight set. Here's some photos of what I did.
Repainted frame and cleaned brass
Somebody used and emory file and made a bracket to hold down brush plate. Must have lost the proper screws
some strange brushes, that one with the copper strands would have torn up the plates
Installed proper screws for brush plate and new brushes
Of course new wheels I could not find solid ones