Is the dent where the bars could have come around and smacked the top tube? BITD, many riders would hide (or prevent) such a dent by wrapping some bar tape in the strategic spot. I'm guessing your son's chrome Paramount has red decals, so some red bar tape (cloth, please) would look spiffy and period-correct. For a more low-key approach, Newbaums makes a gray bar tape that should be more subtle without being too matchy-matchy.

Or just leave it alone. That is absolutely a valid option.