F.Y.I.windlass rust blocker firearm cleaner,I have been using this on my firearms for a long time. Now that I am into black powder rust seems to be more of a issue. I have been putting this on all the metal surfaces on my G.P.R. from day one, and so far so great! it has a vapor phase corrosion inhibitors that seals metal against the air and moisture that cause rust.I flush with lukewarm water dry and finish with windless.When the windless drys, its a beautiful thing! :wink: I got it from Atlanta Cutlery .com