I have a feeling that Hiredgun is just trying to drum up business for his coating service.
I put my rifles through a good deal of abuse due to living in an area with 100+ inches of rain a year and in a saltwater environment. Hell, the saltwater comes up to 3ft from my deck on high tide. I've never had 1 day of hunting result in rust like that with a properly oiled rifle. More like 3-5 days of hunting, with no wipe down/oiling during the hunt. YMMV.
