I didn't know they made high temp primer. I would be pissed. You need to have him reblast the inside just incase the paint/primer starts to flake off. You need bare metal so you can season the metal with oil kinda like you would with a dutch oven.
Green UDS (UGD)
Blue UDS (UBD)
Homemade 18"/36" Grillzilla
Lang 60, (RIP)
Home Built Trailer (500gallon Oil drum).(RIP)