I mainly just lurk in BladeForums, but after reading many peoples questions on the best way to store their knives, I can 100% guarantee the two products below cannot be beat. I have been using them for years now, and not one of my knives has ever developed even a single micron of rust.
The first product can be found at: break-free.com
It is called Collector. A description from their website can be found below. It has the viscosity of 30W motor oil. A little on a flannel cloth is all you need. Just wipe any and all metal so that a thin sheen is visible.
Collector Liquid provides a protective coating against rust and corrosion on metal to metal finishes; no need to remove before use.
-Developed for military use to protect weapons for up to 5 years in storage.
-Exceeds military requirements for rust and corrosion protection.
-Unique 100% synthetic oil formulation with multiple high performance anti- rust and corrosion inhibitors.
-Will not break down to form waxy residues under heat or with age. Contains no wax or mineral oil.
-Protects up to five years. Lab test results show over 1,200 hours of rust and corrosion protection on mild steel panels when exposed to 100% humidity at 93 degrees with out developing even one micro of rust.
-Does not have to be removed before firing; always "grab and go" combat ready condition.
-Safe for use on all metals and finishes.
-Ideal to protect gun collections, knives, swords, and sports equipment.
The second product can be found at: kleen-bore.com
They are called The Inhibitor Storage Bag. A description from their website can be found below. Once you have put a sheen on all of the metal, place it in one of these bags.
The Inhibitor
As Featured in
American Rifleman
The Inhibitor Storage Bag is ideal for long term storage of your firearm, particularly in humid areas. The Inhibitor Bag Releases VCI (Vapor Corrosion Inhibitors), eliminating the potential for your firearm to rust while it is not being used. The Inhibitor Bags will release the VCIs for up to three years, and the bag can be opened and reused during that time. Available for handgun and long gun.
The 6 mil. Inhibitor storage bags provide long-term corrosion protection for all your valuable firearms or other metal possessions. These unique bags incorporate the technology of Vapor Corrosion Inhibitors (VCIs) to blanket your firearms with an invisible shield from corrosive atmospheres for up to three years. This combination of VCI protection and moisture absorbing desiccant action protects against normal humidity and oxidizing atmospheres as well as corrosive marine and tropical environments. Items stored in the Inhibitor storage bags are always ready for immediate use. This technology provides full corrosion protection, without the need to clean or degrease prior to use. Available for handguns and long guns.
I can promise you will be very happy with this combination. The knives come out looking just as they went in...every time; guaranteed. All of my knives, including my Damascus 110s look like they did the day they left the Buck factory. The brass will NOT tarnish whatsoever in these bags as well. If you shine the brass up with NEVR-DULL, it will come out of the bag with the same brilliant, un-tarnished shine it went in with. Granted, other polishes such as Brasso and such shine pretty well, but NEVR-DULL leaves NO residue whatsoever.
The Collector Liquid from BREAK-FREE will not harm the handle scales whatsoever. Although I do not intentionally coat the scales, I have of course gotten it on them numerous times. I have not had any ill effects of ANY kind on wood, bone, or stag scales. This product is fully synthetic and will not turn acidic like mineral oil or non-synthetic oils. You will truly be impressed with this product. That I can promise you! I have wiped cosmoline off many stored surplus M-1 Garands in their original wooden crates, and can tell you this product provides superior protection over the cosmoline due to its ability to flow into areas that the cosmoline can't reach. It is not thin and watery, but has a similar viscosity to 30W motor oil. It's not too thin, and it's not too thick. It stays put; if you know what I mean.
F.Y.I.: The aerosol versions of BREAK-FREE products use CO2 for propellant; which is also harmless in itself as well.
I hope this helps!