Rust repair on chrome bumper

So I was washing my truck over the weekend and I notice a very small (like the size of the tip of a sharpie) rust spot on my rear bumper....in that narrow gap right between my license plate and that plastic cover over the hitch assembly.

What's the best way to repair this to prevent further corrosion?

 

Probably surface rust, removable with a scrotchbrite pad or even your fingernail.

If you use a chrome polish like Nevr-Dull or Flitz, rust spots will take longer to appear:

https://www.tacomaworld.com/threads/rust-on-bumper.69980/#post-1416136
https://www.tacomaworld.com/threads/rusty-rear-chrome-bumpers.139583/#post-2729233

 

Remove any loose chrome, remove the loose rust, then neutralize the remaining corrosion with Naval Jelly (phosphoric acid). Then touch up the spot with silver enamel paint to prevent it from rusting in the future.

 

Thanks....a co-worker suggested steel wool & vinegar??

 

Anything abrasive will remove the loose rust. Scotchbrite, sand paper, wire wheel, or steel wool. Vinegar isnt necessary. Then use phosphoric acid or a jelly that contains phosphoric acid like Naval Jelly.