We produce a very aggressive investment remover called Gypsof. Mixed
with water, it removes investment aggressively, and is also used as
a mild pickle. It is quite safe. A pound of this granular product
will last a year in most small shops.
Contact me for a copy of the msds.
While I have your attention--why not wear breathing protection
around the potions you are concerned about? We manufacture rubber,
wax and investment. Nobody goes into any of these manufacturing
areas without breathing and eye protection. Yes, even rubber
manufacturing is quite dusty, not toxic, but who wants to breath it?
I know, the mask messes your hair. Too bad, better your hair than