It is hard to add to Jim's advice on any subject. All I would add is that a little Kroil never hurt any thing you can't get to move on a gun or any other thing made of metal. Will reduce force needed, reducing chance of harming anything on cylinder. Patience and Kroil. Let it soak, doesn't take much.
Pray and Shoot Daily.
"Extremism in the defense of liberty is no vice. Moderation in the pursuit of justice is no virtue."