Had a core box explode on me at the old Johnson Foundry in Toledo, ended up with sand in places sand should never be. | Foundry Workers - Freelance Forum - The Community for Independent Professionals
Honestly, you found it that bad? I worked a summer at a different foundry and the sand was just annoying, not that hard to clean. A good shake of your clothes and a shop vac for the car did the trick for me.
Seriously, it's the heat that bakes it into a crust. That fine sand mixes with sweat and just sets like concrete in your boot seams and pant cuffs. I had to soak my work pants in a bucket overnight before they'd even go in the washer.