First I can tell you bare CI is a ROYAL PIA to care for if you live in anything but a desert climate. I have them on my Wolf and while they give nice marks and are pretty easy for food release I HATE HATE HATE them for the maintenance headache they are. No matter how much I season them, care for them what have you they continually rust and flake. Porcelain or SS is the ONLY way to go IMO
BTW your grates look to be the shiny product but I have to say that even the dull ones after years of use and "seasoning" tend to get a "shine" on them. So hard to actually tell what you have