was given a tip by our local RFD as to the best way to remove old bluing was Brown sauce (any brand) and vinegar (I Laughted) but it worked as its still acid and was cheaper,as for the cleaner/degreaser the wifes nail polish remover and her face pads as wipes hardly cost ME anything tried it yesterday and it worked great but less brown sauce on the eggs in the future seen what it did to the actionI also have used valve grinding paste finish off with the fine you can still get the double ended tins today,I used to it recrown a barrel over the weekend turned out fine