I take light scratches and miscellaneous metals off of my car with varying rubbing compounds. Compounds are like liquid sand paper, they come with different grittiness. Start soft, move to more course if it doesn't get the job done. Finish up with soft stuff to remove scratches the harder stuff left.
If the main surface has a coating, rubbing compound could damage it or remove it. Always use a rubbing compound in an inconspicuous area that won't be a problem if it is damaged first.
The harder you press with a compound, the more it will be abrasive. The courser the compound the more it'll be abrasive.
I use various compounds to remove scratches (and paint rub) from the finish of my car.
Please -- BE CAREFUL BE CAREFUL BE CAREFUL.
ETA: 3M makes a variety of rubbing compounds of different grits. Look where automotive detailing supplies are sold. In Lansing a place called Johnson Michigan Automotive sells a variety of compounds. Meijers will sell some in the automotive section, but the variety will be thin.