I have never done anything to knives except wash them thoroughly and let them dry.
If they are not stainless and I do not eat or cook with them, I apply a little oil. About any kind will do.
>> I apply a little oil
Good to know. Will start doing that.
Reminds me when I applied tractor grease to cuts given no other immediate options. It certainly helped to slow down the bleeding, and figured any bacteria wouldn’t like it.