When I was a TEENAGER, and just starting to cast*, my father's admonition was "Son, you haven't lived until you spill hot lead down your boot." End of safety lecture. I started in a room in the basement with no artificial ventilation. In cold months, you could tell how many times I fluxed the 10-lb SAECO pot by the layers of smoke hanging in the room. This all changed with time.
Looking at my hands, I can tell stories of casting by the splatter scars before I started wearing gloves. I think Dad got me a pair when I started using his plumber's furnace to cast ingots with the two-pound ladle, and then work with the H&G pot-belly six cavity #50 wadcutter mold. Given the time and effort involved to herd those beasts for a casting session, adding boots and denim coveralls with gloves and a face shield wasn't that much of a chore. I still have that mold, but it needs a little professional polish to the underside of the sprue plate and tops of the blocks. Next project...
*General disclaimer