I went to Ace Hardware today. They didn't have autosol, wenal, neverdull. Forgot to look for gel toothpaste (didn't put it on my list). They had a Mothers polish but it was light weight. Label said if badly tarnished use Mother's something else and they didn't carry it. So I got some rubbing compound and steel wool.
It didn't work. There is no chrome to polish in those spots. Something has eaten into the next layer of plating. Polishing it just makes it look worse.
A good wax job did make it look better from a distance. I guess I'll use it as is. I'm not building a show truck anyway. It will be a 50/50 driver.
If I do some day happen to find a couple thousand dollars laying around in my sock drawer I have a cherry painted grille in a '53 2 ton I can have chromed. The insert is the same as the 1/2 ton.