HF diluted to <1% is used to wash cars, and only idiots don't wear skin protection while doing that. To reliably etch glass, you need concentrations of 10% or

HF diluted to <1% is used to wash cars, and only idiots don't wear skin protection while doing that. To reliably etch glass, you need concentrations of 10% or preferably more, at which point you really want a PVC apron, a face shield and a heavy-duty fume hood to work with it, to avoid the sort of exposure in [1]. [1] https://www.uvm.edu/cosmolab/safety_manuals/Fatality%20due%20to%20acute%20HF%20exposure.pdf https://www.uvm.edu/cosmolab/safety_manuals/Fatality%20due%2...