Hi Todd,

I too have purchased an evaporator from Heilysier. Before you use it you
might want to practice with it before using it in a hive.

If you apply too much heat the vaporizer will clog up.

I was able to purchase a good respirator for less than $40 at Home Depot, the
Oxalic Acid I was able to purchase at a local paint supply store for less
than $6 for a pound.

I would strongly urge you to check out the MSD (material safety data) sheet
for Oxalic Acid. You can find it by using google.com and oxalic acid as a
search.
It is nasty stuff as far as being in powder or vapor.

Regards,
Ralph Harrison
Milford, CT