Quote:
Originally Posted by
JLibourel 
What is all this talk about Remington 870s being prone to rust? I have a blued finish 870 that I bought back in 1966. I haven't used it much in recent years, but my stepson shoots it quite a bit. It's never had a spot of rust on it. I've used nothing more than WD-40 as a rust preventative for many years with very good success.
Now, if I hunted waterfowl in salt marshes or spent a lot of time with a gun in swamps, I would be more assiduous about rust prevention.
It's uncommon, and it shouldn't occur with proper care, which is ridiculously minimal. However, in high-humidity, low-lubrication, sustained exposure situations, minimal surface rust can present itself. Clearly, any kind of oil will prevent that, but some people are overly anxious about the possibility and want to just not care about such a shotgun. Thus, they throw on a durable finish like Cerakote.
As far as I'm concerned, though, you buy an 870 because it's the Glock of shotguns. Even if you stored it at the bottom of a salt pond for the next decade, it would probably fire, even if it weren't pretty.