My teaching lab was for undergraduates who were etching oxide off of silicon wafers in a big old tub of hf. We’d have them wear a big thick apron and massive gloves; this is not an occasion requiring dexterity, and it’s one with a high potential for inadvertent splashes. We never had an exposure in the years I was there, although a grad student in a research lab got careless and took a cold, rusty shower.