I ginned some of this stuff up years ago after reading the label on sta-lub. Using a .454 sized boolit and some of this loob I proceeded in 'cleaning up' the barrel in a well used and slightly neglected Colt M1917 revolver. Like others have reported there was a grey wash over things, but no leading. Light rifling reappeared in what I thought was a fully shot out barrel. Close range accuracy came back a bit also. I was actually quite pleased with the results. Somewhere back on the old Shooters board there was a discussion of this with our dearly departed friend, Felix, explaining a little bit about the ingredients of the grease. I did not cared for the odor when fired, but still use it occasionally, as I have a Ly 450 still loaded with some.