Sweat actually is a bit corrosive. There are some salts in it, some people more than others.
As to Ceracoating it, it's not the best thing for a revolver. Back there on the grip frame it won't be a problem, but you need a nice healthy (read thick) for it to hold up well. That's not going to work very well in the cylinder area.
I'd call S&W if it bothers you. But I would just wipe it down and carry it.
ETA: It does sound as though something might be up with the anodize coating. It is normally very corrosion resistant.
As to Ceracoating it, it's not the best thing for a revolver. Back there on the grip frame it won't be a problem, but you need a nice healthy (read thick) for it to hold up well. That's not going to work very well in the cylinder area.
I'd call S&W if it bothers you. But I would just wipe it down and carry it.
ETA: It does sound as though something might be up with the anodize coating. It is normally very corrosion resistant.