What will Cerakote NOT weatherproof???

[schoolcraft]

Going to have my Remington CDL cerakote finished next spring.

I know the inside of the barrel can't be coated, but I'm wondering how much of the receiver CAN'T be coated. I assume the inner portions of the receiver where the bolt is contained when shut.

Really just wondering once all the metal work is coated, if there are any "hot spots" I should check periodicly for rust.

Or.....is there anything like Cerakote that WILL give me 100% metal coverage?

Any input would be greatly appreciated.