han, it's been my experience here in south Louisiana, where it is often very humid, that WD 40 does not protect metal for more than just a few days. For long term storage of my tools (shovels, saw blades, axes, etc.) I use motor oil -- it's relatively inexpensive, easily obtained, and it works. For my khuks, which usually stay indoors in an air-conditied house, I use a clear, general-purpose, silicon-based lubricant.
so motor oil works. i have accress to silicon oil i think but being from the us, there is this warning sign that says that the contents are know to cause cancer...it got me real worried. any way was thinking of using the motor oil to coat the knives and then using a wrapping flim to wrap over it. It seems to work well.
Any good motor oil should work to protect your knives.
As far as any kind of "film" covering I would be very wary.
It is possible if you cover the oil treated blades with plastic film it "could" draw moisture and make the knives succeptable to corrosion?
I am not real sure what I would advise, but I think if it was me, I would coat the knives well and wrap with a heavy paper and then perhaps with a "waxed"
I have recieved precision machine tool parts from overseas wrapped in a sort of a heavy grease impregnated paper. And the tool parts themselves had a coat of heavy, thick grease. This grease wasn't easily wiped off. I had to use a solvent to get it off the parts.
I believe that Uncle Bill recieves the khukuris from Nepal with a coat of grease and with the knives in the scabbards? Bro.??
I would not wrap the khukuri up after applying motor oil with film (assuming it is impermeable). Trapped air is likily to contain moisture and the oil itself probably contains a very small portion of water. With temperature changes water can condense onto the blade.
Wrapping in paper should work well. The paper will help to maintain a uniform film and still breaths.
Check out the MSDS sites for info on motor oil. Some of them are composed mainly of mineral oil.
Han, Machine parts are often packed in a brown grease called "Cosmoline" and you might find it if you know a parts exporter. You could ask around at a hardware store, garage or anyplace that would deal in metal parts. A second alternative is to use clear petroleum jelly, sold her in the USA as "Vasiline". It would be available at any drugstore/chemist. Another alternative would be any bearing grease, then wrap in wax paper so it doesn't bleed through.
One odd-sounding trick I use in my toolbox is to put a moth-ball or two in with the tools, the napthalene vapors do wonders for preventing surface rust.
best wishes from Georgia, USA!
Micah 6:8. Well worth the attempt!
Motor oil works fine for preventing rust and much better than WD-40.
That warning about cancer is for the petroleum not the silicones ... ingesting petroleum products or breathing the vapors is carcinogenic. The same applies to the motor oil and anything that contains petroleum.
I'm surprised you can't get mineral oil; I thought drugstores all over the world had it.... Can you get white grease (Vaseline)? That's safe for food.