Florida here, and the PM45 stainless and PM9 stainless seem good to go - in my sweathog front pocket of my jeans. I think they're gettin' sweated on, and wiped at teh same time!~
I've had one stainless gun rust - my little SP-101, one of the first Ruger made - has some pitting on the frame. Go figure. It was put away "wiped" with CLP, and taken out of a "gunny sock" silicone treated storage... with pitting... in an AC low humidity house. Can't explain it, other than salt is not removed by oils, but by water, as pointed out by Prof. Huff, Bureau of Mines back in the '03 Springfield days.