Paint, man, I hate paint! Everything was sand blasted. Pit sand blasted inside and out.
Trailer is a sprayed gloss black just an industrial paint/primer from local auto shop.
Pit well that is another story. I want a gloss finish to the pit. So, I started with KBS coatings Zinc primer and then charcoal metallic top coat. I tried rolling it on. It looked like crap. I loved the paint, but it must be sprayed, and I would say not can sprayed. So, I canned that idea and the money wasted on it.
Sand blasted the pit (outside) back down to bare metal and painted with high temp rustoleum flat black (sprayed) three coats no primer. I am still happy with outcome, but wanted a shiny finish. Time will tell.