Who uses it, who doesn't? What are your experiances and how do you use it?

Im not sure I really trust it for strorage as a rust preventer but a friend of mine runs a patch of it down his bore before he shoots and his tenth shot will load like his 1st shot. Works great that way for him so I might try that next time I go shoot. Used to use it for storage but would get a rusty bore every once in a while so I quit. Think you have to know how to do it just right for it work that way.