I agree with Randy on this one. It's the human health that I'm concerned about. I see people using vaporizers and foggers with no protection. The MSDS and EPA directions are not clear, about appropriate protection.
A simple paper dust mask isn't going to do much good. For inhalation protection, invest in a good respirator mask with organic vapor/acid gas cartridges. Be sure to wear eye protection.
In our online courses, we only recommend oxalic drip to our beginners, and I hope Randy's glycerin/oxalic method proves out.
We include a vaporizer demo, with lots of emphasis on human health risks and proper safety gear, in our Journeyman level course.
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