“Basics of Basics” Control cable repair.
Good methods and advice. I think the most important step is to not get in a hurry. Once you get that rust broke loose, try some Break free. I find it works amazingly well. The gun guys use it. I think it meets several Mil-spec requirements, but I'm not sure. Triflow is another good one. These lubes also loosen up "stiff" cables. Worked on my '66 Chevelle heater/AC cables.