Ernest Christley wrote:

Ferric chloride is good, and I figured it could be had; but, it would be
a hazardous, special purpose chemical that would sit around for a very
long time with very little likelihood of ever being used again. Muriatic
acid and hydrogen peroxide are both useful for all sorts of things.

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Dear Ernest (and the Group),

Definitely go with the acid over the Ferric Chloride. I only use the
stuff because I'm already set-up to do so. The acid-peroxide stuff
sounds like a good idea.

-R.S.Hoover

PS -- I'll post pix of the thang I use for drilling on the Chugger site
then copy an edited version of the March posting to my blog.