You can also use colored "lacquer sticks" as described in my SX-28
restoration article at
http://antiqueradio.org/halli12.htm .
As others mentioned, it's not tricky to fill engraved markings with color.
Have fun!
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html
"Roger and Ute Brown" wrote in message
...
I have used the same method utilizing artists oil paint (white or black).