every year i also run the pc over them with liquid compound, and then wax with the buffer as well. this takes out any small scratches they may have gotten over the year. the regal you kinda pop the trunk and grab by the top of the lic plate so your palm touches the center section of the tail lights and gets light scratches here and there, pc takes it all away.
crappy cell phone pic, but they still shine just like this, no flaking or nothing.
i really cant wait to fix the bumper, its awful looking.