Yeah. Whenever I'm watching a duster and the waddies are herding cattle across a deep ford, I often wonder how many rifles in scabbards took a soaking and were never dried, cleaned and oiled. Same applies to pistols.
Can't say I recall more than one or two examples of Cowboys cleaning their guns in movies, and then they weren't even on the trail.
At a live fire demo at an historic mining town, we got hit by a torrential mountain thunderstorm! Man, did it rain! We had pistols in glass covered display cases and at least 18 rifles and shotguns out on tables.
We high tailed it into the carpentry shop and spent the next hour drying, cleaning and oiling as we had another show scheduled.
A year later, I had feeding issues with my '66 carbine. I pulled the mag tube plug and was shocked to see the rusty spring and interior of the tube.
And that was not a full immersion baptism, just a shower.