Winchester model 94 finish coming off (help please)

[Shaggy 7510]

I have recently obtained some older Winchester rifles from an estate. Upon looking through all the rifles I had found some of the finish is coming off the metal and it is going from black to white. I would like to fix this so I can display them but do not want to experiment with the guns as they are new never fired condition. I don't not have much experience with this so any help would be great . See pictures.

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