I accidentally bumped into someone's rear bumper yesterday. I was barely even moving, I'd say no more than 1-2mph. I didn't get any dents, but his Jeep seemed to have left some scratches or scuff marks? I ran my finger through it and there doesn't seem to be any valleys. How can I remove these thin vertical grayish lines?

 

use rubbing compound. if that doesn't work get fine sand paper then wet sand and buff it

 

find someone with a porter cable and knows how to use it.

you want to TRY the least abrasive stuff first.

that looks like superficial I bet it will buff out/