Have any of you guys used ZEP 45? I have a can of that and at $12.95 a can it is not cheap, but man does it work. I've used it on some really rusty farm equipment and was amazed that it just broke free nuts and bolts that hadn't moved (and sat out in a field) for 10 years. It is really good stuff. The Kroil stuff sounds like it is the same stuff.