Kroil is the best there is, but you do have to lube parts after you free them with Kroil, unless you use one of the other Kroil products with a added lube. The Kroil folks are great to deal with! Gibbs and WD-40 may be fine for screen door hinges, but nothing works like Kroil on stuck metal mechanisms! I got my first can almost 20 years ago from a power plant mechanic.
Les
