After shooting my '51 some this afternoon I started trying different things to remove that corrosive red cap fouling. It's not water soluble so the usual cleaning procedure doesn't work. I tried Hoppes, Shooter's choice, kroil, wd-40, brake cleaner, and others and finally decided Bore Tech Eliminator worked the best. But it still takes some scrubbing and I don't fully trust it. I assume the old GI bore cleaner would probably be the best since that's what it's made for but I don't have any. So, what do the rest of you use for cleaning that mess off? Anybody find the magic bullet yet?