The message k
from "dennis@home" contains these words:

Be very careful.
You can end up making a nice bang (silver fulminate IIRC, its 25 years
since
I silvered a telescope mirror).

It's hard to see where the carbon would come from if you'd taken the
trouble to get the mirror nice and clean.

--
Skipweasel
Pay no attention to that man behind the curtain.