Cut small piesces of tape and cover the writing .
Be very careful of what you use, cleaning the copper is hard because
it's plating and could be removed easily.
73 Chris, VE3NGW/W4 Florida

Hockeyguy wrote:

Hello to the NG,
I have some old Eico gear & would like to clean up the copper chassis a
bit. There is black lettering on the chassis also. I'd like to clean up
the copper without taking the lettering off! Does anyone know what I could
use on the copper chassis without harming the lettering???

Thanks,
Steve K2FW