Smith and Wesson stands behind the guns they sell, even if your not the original owner. They have a great customer service department, and will refer you to someone who can understand your problem.
I use a Golden rod in my safe. I also have a dehumidifier in use from spring until fall season. I try to open the safe for a few hours every month.This system works for me. (I also have another safe that doesn’t have a golden rod. No rust knock on wood!
I'm considering a 686 no dash with 6 inch bbl with the 4 position front sight. I thought it was too early for the sight. Perhaps its a take off from a later 686. Thanks to all for your replies.