Do Not Store Knives, Swords or Guns for the Long Term in Leather

by nwtracker
(Seattle)

The treatments for leather to make it suitable for use can contain many substances that are harmful to metal.

Often finished leather has a slight to heavy acid content to stabilize the leather. Any moisture content can deteriorate you stored items.

I've found for the storage of black-powder pistols (Black powder is highly corrosive.) a good cleaning with soap and water. A good drying of the item, and an application of "break Free" is one of the better products for long term storage.