It is impossible to completely remove dents from chromed trim without re-chroming. Stainless and aluminum trim is a different story. I have succeeded in completely eliminating trim dents in stainless and aluminum. The process involves tapping from the back side over a small anvil then marking the front side with an indelible marker. You then file off the high spots and keep tapping the low spots up. You repeat this process until no low spots remain. You have to be careful to use a fine file. Then sand with progressively finer sandpaper then buff. As you can see, if done on chrome, you will remove the plating. At best, you can eliminate the low areas slowly but you cannot achieve a perfectly smooth result without re-plating!