Anthony, 52100 being a non SS can rust, easily, given the right circumstances.
I guess a lot would depend on the person. Some have more corrosive perspiration than others. Also, what preventative care was given to the knife would figure in.
I have an old Al Mar Falcon, that I have carried since 1979.
I used to live in southern California, and wore it in swimming at the beach until 1988, when we moved to AZ. There has been no rust at all.
I always lubed the pivot with mineral oil, and gave a light coat to the rest of the metal with same. Of course being stain resistant helped, but salt water, and being carried in the pocket of wet trunks all day, maybe it is not a big problem.
Personally, I like 52100 and think it would make a great pocket knife. Sorry I could not be of more help.
