I have a bunch of USA Schrade Old Timers and some Case and some Klien slippies, what is the best way to prevent rust on the blade? I am fairly warm and tend to sweat a bit and I am seeing a bit of rust forming along the line where the blade is with the scales. I am thinking a bit of Johnson's paste wax or some type of oil. My knives are used from cutting open boxes to slicing a nice summer sausage.