Damascus steel as well as 1095 high carbon steel knives are different than some other common steel knives. Because of the steel's high carbon content, it can rust if not cared for properly. If you see rust on your knife, then use WD40 to remove it. Never store your knife for a long time in the leather sheath. Leather can absorb water which will rust the knife. Always clean the blade after using and apply oil or wax before you store it, to ensure its longer life and durability.