[Marsupial]

2 questions.

1; how to properly clean the dial glass without damaging its printing?

2; the Philco 47-1230 has some metal attachment on the back of its backglass. On the back, it seems like it is some tin foil, even has an aluminium look to it. However, the glass side seems to be rusted.
Is it rust? How do we clean it?

   
   
   

thanks a lot for any help.