I keep my tools in an ammo can, occasionally I spray some oil in there. My
Crafstman, Snap-on or MAC tools are doing fine. That is on a boat that sees 300
hours a year on salt water, stored on a lift over salt water when it isn't in
it and I am not a maintenance fanatic.
I haven't had to do it lately but I know you used to be able to take a twisted
up, rusty old Crafstman tool back to Sears and they would give you a new one.