The late Paul Hostetter's tuner maintenance page is an excellent place to start the process
http://www.lutherie.net/tuner.maintenance.html
The late Paul Hostetter's tuner maintenance page is an excellent place to start the process
http://www.lutherie.net/tuner.maintenance.html
Clean old oil and grease out with Naptha and a toothbrush, then remove rust with a bath of oxalic acid(only attacks rust not steel, but also cleans brass) then run them dry with an electric screwing...