I have to agree with Bob. When I redid the bumpers on my 52 a couple of years ago I found that almost all of the chrome was previous years over run. After that the bright work was polished stainless steel or pot metal. Most of what had been chrome on the interior in earlier years got painted during the war.One oddity I found, that I was unable to confirm, was that the front bumper was painted with the rear bumper being chrome. I didn't look into whether or not the rear bumper was an option. That might account for all the chrome rear bumpers.