Advice needed on how to clean/polish old ugly chrome bumpers

I use OOO, and OOOO steel wool on chrome. You can also use a lite oil, or something like WD-40 with the wool. It works good for me. It wont remove pits, or scratches. It takes a little elbow grees, and time.
I've even used it on chrome plated plastic on newer vehicles, but you have to take it easy.
Been doing it for years.
Black, your bumper looks a lot better.
Dave