Fender Trim
I would be extremely careful sanding chromed steel as the "chrome" is very thin. You might end up with shiny steel instead. Look at some YouTube videos on this.
[ame="https://www.youtube.com/watch?v=JkHyARsjNEg"]Remove Rust from Chrome in Seconds with Coke and ...... - YouTube[/ame]
[ame="https://www.youtube.com/watch?v=HZ0wQVXSgnQ"]How To Restore Chrome (The Cheapest & Easiest Way) - YouTube[/ame]
Just a couple of examples.