We only get noteworthy humidity for about 2-3 months of the year, so my experience might not be quite as applicable as you'd like. I use a single Goldenrod and have never noticed a problem. The only gun I've had with any kind of rust problem is the shotgun I carry through the desert - you know, the one I've rubbed all the blue off of, sweated on, scraped up, etc. Otherwise, all good here.