My basement flooded for the first time ever about 15 years ago. Much of my reloading and casting equipment was down there stored in various containers. Some of the containers floated around or sunk and filled with water. Much was ruined. Fortunately all my loaded ammo was in military ammo cans with intact seals and survived.
This particular story is about a micrometer that had gotten lost in a small soaked container and not found for several years. Nothing special about the micrometer. It was rusted sufficiently that the adjustment knob would not turn at all. I tossed it aside and thought I had thrown it away years ago.
A couple of years ago I moved and apparently that micrometer moved with me. I found it last week while searching for some other things and laid it on my gun cleaning table. Just for grins I sprayed it heavily with Kroil just to see if there was any hope for it. This week I stumbled across it again while cleaning some pistols. When I picked it up, it still wasn't wanting to turn. I gave it a light tap on the table and it started turning.
After a very short time it regained full movement and now opens and closes completely. UNBELIEVABLE.
Kroil is really good stuff.