My front Warn bumper is starting to look a little marred after year in the Florida sun. What can I use to bring back the shine on it short of painting it? If used the black restorer I use on the fenders but that is not designed for metal so it doesn't work so well.
Honestly, I've always just considered repainting/re-powdering every year or two as part of owning a steel bumper. I usually scrape enough rocks that I touch them up until the end of the season and just have them recoated.
Not 100% sure it would work on the finish, but you might want to try tire shine on it. I know a lot of guys use that to clean up their frames and make them look new again.