Will Cerakote keep receiver from rusting in adverse conditions (boat), on a blu'ed Remington 1100?

Thanks.

For how long?

Cerakote, oil it, store it, should do ok.

Semi-permanently stored in a cabinet on board.

It will be semi-fine.

Isn't that one of the reasons for Cerakote?

The problem that I've seen with Cerakote is that start up costs are so damn inexpensive. There are a lot of billy bobs doing cerakote in the their kitchen oven....the key to any of these finishes, cerakote included, is good prep. If the metal is correctly prepped and the finish applied correctly Cerakote is one of the best finishes out there. Watch the video.

There's 2 kinds of cerakote. Oven/heat cured and a air dry version. Heat cured is the best for high wear parts (moving parts-metal on metal contact). As mentioned above proper surface prep is everything. Mess this up and you've wasted your time and money. I've read the air dry is actually better for surpressors (externaly applied-doesn't discolor as bad from heat).

I'm certainly no expert, this is just imho based on my own research. Me, I'd use the oven cured on receivers and certain internal parts. I'd do things like barrels,comps/flash suppressors and sound suppressors with the air dry versions. For furniture I'd probably go air dry on stocks and oven on most forearms. You can do a good job as a DIY project, it just depends on whether it's worth the time, equipment expense, and if you got the work space.

When done properly the oven cured is one of the best options out there imho.

Good luck OP.

Parkerize it and keep it well oiled.
The CeraKote is swell. Until you get it scratched or there are light spots in unseen places.
The Parkerizing is an immersion process so any unseen areas, nooks and crannys are protected.

Used to be a guy out of Tucson, Mac's shootin irons, that had a 2 step process. First was parkerizing the weapon and then a moly based coating. He called it "Tuff coat" and that finish was indestructible.

... if applied properly, yes

Doesn't matter.  Guns on board boats are accidents waiting to happen.

good point!

Do you keep cookies on your boat OP?

very nice.