Even stainless-steel can rust, and I've seen axes and saws that were visibly rusted. I've been told that wrapping the metal parts of the tools in oiled paper will prevent this. Can oil really be used ...
Several people have talked about having single edge knife so that you can cut down small trees. What is the proper way to cut or carve wood with a knife?
Under the assumption that an emergency kit like the ones listed here are for the emergency of getting lost and being stranded for days, how necessary is a knife sharpener?