I cleaned the whole thing with carb cleaner and then sanded down some pencil lead and put that in there to keep it free.
Del.
see post #8My Sheen spray polish is excellent in those sorts of locks
Bad plan.
Pencil lead is a mix of CLAY and graphite. The clay is hard and very abrasive to brass. The grains of grit from the sandpaper will help to destroy the lock.
My Sheen spray polish is excellent in those sorts of locks