Steve Hoch
TVWBB Hall of Fame
The conventional wisdom here is that painting the inside of the box is bad and I don't necessarily think that part is wrong. It also says that weber didn't paint the inside of them originally which I never agreed with. I don't remember my grill, which I bought new, ever being shiny, bare aluminum inside. I have also seen pictures of brand new cookboxes that are clearly painted inside, though not very well. I'm sure that the paint Weber used was meant to stay on and not out gas like the stuff we have access to. Here's an example https://www.ebay.com/itm/154630471445