My father gave to me avery nice little skinner made from a file. While I can sharpen it to a terrifying edge, it does collect rust. What do you guys use to prevent this besides oil. I don't want to saturate the sheath and discolor it. I have carnuba waxed pistols before a six month deployment and left them in storage 2 miles from the coast with good results. I am not sure about cutting food type things with a waxy blade though. Any thoughts?