Reliable sources say that this contaminant is industrial etchant spray
used for glass frosting, It is a high pressure aerosol of propellant,
lubricant and silicate abrasives. This accounts for the high permeation
levels displayed in all 3 samples, with particulates presents inside even
'tight' buds all the way into the stems. This also may account for the non
plany oils present in the bud which have been previously described as a
'glue'