Once I worked in a very informal lab and we were always looking for alternatives to buying industrial chemicals. I was working with optics, and Everclear came up as a good alternative to denatured alcohol or isopropyl alcohol. My friend who ran a microscope lab said it was pure enough to clean optics... however, since it was illegal to buy in California, we had a friend pick it up in Arizona and drop it off with us.

We put it in the flammable storage cabinet with a label saying it was 95% alcohol. Once during a lab inspection we tried to explain, but the inspector just said "yes, I went to college"