Howdy folks, It's great to be back. I was a supporting member, advertised my handmade knives, sold to various members and got wonderful reviews. I still make custom, handmade knives using excellent steel and the best flintknapped obsidian blades with elk and deer antler handles. One thing — my skills, techniques and materials are quite a bit better. I need your help, however, on a valuable knife. My National Living Treasures Series knife made by Jim Fisk, the OVB (Our Very Best) Fisk Southwest Bowie from Camillus, has oxidized fingerprints on its blade. The 11-inch blade is fabricated from 0170-6C Carbon Steel. I've searched how to safely restore the blade, but not found the best answer. Lime juice, cut an onion, CLR, metal polish — what works? I tried good gun oil and buffing, and tested oil and .0000 steel wool, which will damage the finish. The knife is one of only 750 pieces, and worth a pretty penny, without the dark finger prints. What should I do? It was displayed on a wall in my office, and apparently people examined it without my knowledge. Incidentally, the fabulous leather sheath, black zipper case and original fancy, black box are in mint condition. I'd like to sell it (been off work on medical leave without pay.) Its Desert Ironwood handle is beautiful. Whoever provides the best answer most promptly is certainly welcome to a significant discount on one of my handmade knives with choice of blade and antler handle. Thank you so very much for your help in advance. I look forward to hearing from you Randy Porter Cell: 402-304-1422 P.S. There's one listed on eBay for $375.