Anyway, the medals are in a bit rougher shape than I was expecting. There's been some oxidation of the brass pins, and some rust accumulation and staining on the campaign and service medals.
I want to clean them up, but I'm afraid of damaging them. I'm not sure how to proceed. And I'd like to protect them against such rusting and tarnishing in the future. Does anybody here have any experience or knowledge in this area or perhaps know where to point me? I realize this step of the process isn't really woodworking, but we're a diverse group of people with a diverse set of skills and experiences and I'm hoping someone can give me some guidance. Any help is appreciated.
Below are some of the medals as I received them today.


Here you can see the staining from the heavy amount of rust on the back side of the service medals.

This picture shows the severe rust.
