Nice work, looking good
got the doors welded on and some work done at the fire box and warming chamber,
then closed it and put the fogger at work even there is no shimni the holes in the top were enuf,
i have a few leaks at the corners of the door the closet to the tower gone solve it whit the rope they use in wood stoves
No, do not paint the inside.
You should season the inside similar to the way you would season a cast iron skillet.
Spray all surfaces inside the cook chamber with cooking oil, then fire it up and get it really hot. As hot as you can get it, but keep it below 500°F (260°C).
If you have a spray bottle, fill it with cooking oil and spray away, What I always do, is mix bacon grease with cooking oil and spray the inside, smells wonderful. even after you get it hot spray some more , grates everything inside the CC.