Looking into purchasing a new shotgun to use for clay/turkey/deer. I'm a bit traditional when it comes to shotguns, and like a classic, no frills, simple pump action. I'm loyal as of now to Mossberg so keeping my options within. Had my eye on a new 500 field all ourpose/ field deer combo. But also caught my eye is the 835 ulti mag 26 inch in MO Bottomland.

My question is related to finish, never owned a camo shotgun. Are they painted? How does the camo finish hold up? Any more corrosion resistant compared to blued like the 500?

You will get some wear.  With that said open your options.  Mossberg is a work horse but take a look at stoeger.  I have a 3000 and 3500 great guns.