I'm using covered glass containers for the small batch tests. Anything large scale will be outdoors believe me.Fun stuff, totally awesome to light it on fire and play in the flames. (They're super cold flames, takes forever to burn you)
The issue with the more volatile solvents is their tendency to evaporate quickly. If I was using them, I'd either seal it in a can, or add something less volatile to keep it from evaporating as quickly.
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