So we have baseboard heat register sin our house and they are a tan color (previously painted). I was wondering what I need to do to repaint them white? Do they need to be sanded? Or do I need a special type of paint because they are metal? I have never painted something like the before. I do have a paint sprayer I will be using. I also have SW promar 200 primer. Will that work? I also have SW latex white paint that is semi gloss and also their ceiling paint, can’t remember the name off the top of my head. It has a more dull finish. Just looking for some pointers before I waste any time on it. If I forget, thanks in advance!