Safety considerations - lead risk to family
It's not so bad for hardware shops that cut a few a day amongst other jobs, but this would probably be compounded within vans with poor air venting for you automotive locksmiths, and for those of you who pop off the clear shielding on your keycutter after it gets scratched up. Anyone here invested in an air purifier for their own mobile setup? At the minimum it's worth heeding the note about pregnant women and young children receiving secondary exposure risks from the locksmiths come home and haven't changed and cleaned up - these things can be invisible and not feel like anything for you, but can affect a lifetime of the generation after you.