[Arran]

Depending on how corroded the chrome is, sometimes it's cheaper making a new part out of brass, and having that plated. The only sets I have with chrome parts are some transistor portables, and a trio of Canadian RCA A-20s, the chrome on the A-20s is like a car bumper, very thick. I think that chrome and aluminum speaker grilles was more popular in Europe, you can count the number of North American radios with them on two hands. At least it isn't all show the chassis has a tuned RF amplifier stage like an RCA 128.
Regards
Arran