I got a low tire light today which reminded me I need new tires.
Not even galvanized steel, and not even any primer from the looks of it. I wonder if my tbperformance bar will be like that after 1 year. I hope not. It's still salvageable though; you could grind it down with a grinder 80-120 grit disc, then wire wheel off all the rust pits remaining, spray a rust conversion coating on it and let it sit time depending on the manufacturer of coating, and then scuff up the coating with a red scotch brite, then refinish. I'd spray it with a self etch primer, or a zinc phosphate primer, then a rubberized undercoating such as this one: https://www.dominionsureseal.com/product/gravel-guard-1-oem-approved-rocker-panel-coating-svg124/