I'm not a big knife guy. I mean, I own several and always do, but I don't take care of them. I don't even sharpen them when they dull. I just toss them aside and buy a new one. But I'm looking to change that. I've got this old hunting knife I've used and had for years. Sat around and just found it again, sharp as ever, but rust spots all over. Is there anything I can do here? It still works and probably will for a while, so no big deal if I can't, I'll replace it eventually. Just curious... Thanks!