Not sure that this question is completely relevant on this forum but I always get good advise here. I was wanting to preserve my sheath and leather handle on my Air Force Survival Knife but I was wanting to use something non-toxic. I wasn't sure about my Kiwi Mink Oil and someone on another forum suggested petroleum jelly. Has anyone tried this? Does it work or have any problems? I though if it worked, I could try it on my HI sheaths as well. I was going to try and melt it in with a hair dryer like I do with mink oil or snow seal on my shoes.