wear the right kind of safety glasses. Polycarbonate lenses shatter when exposed several solvents, including acetone, and something in Berryman's B12 Chemtool. I was lucky, only got a little on the PC glasses, and they just crazed. Still had to replace them, and lucky again I had a spare set. Just a little overspray blown back in my face as the wind went sweeping down the plain.
Bill