Bob Engelhardt wrote:
Christopher Tidy wrote:

What acid do you use, Igor? ...


As Iggy said - use muriatic acid, which is a low grade hydrochloric acid
(HCl). There is LOTS of info in the Google NG archives. Search RCM for
"muriatic rust".

Briefly:
- do NOT use it in the shop. The vapors WILL rust every exposed steel
surface!!!
- it is not particularly dangerous, except to the eyes. And the fumes
are very irritating to breathe.

Second That!
Please stay upwind of your project. If you don't, you will very much wish you had.
DAMHIKT

The acid I used for removing galvanize liberated heat and bubbles in use. I was pleased
to be wearing eye protection at the time.

--Winston