I spray my lathe , mill, drill etc with ACF 50 . Bloody expensive but a superb product , designed for protecting aircraft against corrosion . A 5L can is about 60 quid but would last years doing a thin coat on plough mouldboards . Do the combine header with it also .I greased up my lathes and other tools before I left them. Put on an old tig welding glove and plastered it about with that.