Thanks for the question. The duct work is standard round metal duct work found in any commercial space or residential spaces with the open loft feel. All we did to take the galvanized look away was to paint them. I believe the painter sprayed them, for a more even finish, but it is standard paint that is compatible with galvanized metal. Your local paint store should be able to guide you if you explain what you are painting. I don't recall the exact color, but it was in the dark gray to black tones.