Here is a bumper picture from the Classic Parts stockroom looking at the two middle holes. Disregard the oily film. They are coated for protection. I started thinking about how these bumpers are made. Steel, formed, holes punched, some grinding, finish sanding, cleaning bath, drying, copper plate, drying and then chrome plating. When, in the process, did these holes get messed-up? I'm certainly no expert but maybe the bumper is held at the two holes for plating and the chrome cannot flow underneath whatever is holding the bumper or the bumper is moving/vibrating slightly in the fixture. Even with the imperfections, the bumper is still a bargain.
I was searching the net to see what people today recommend to clean and protect chrome. It surprised me that one person said chrome needs to breathe. Wax should not be used. Well call me Rip Van Winkle, when did this happen?
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
