If anyone’s passing through and thought “huh glass etch? neat!”, just be aware that glass etchants contain HF, which is one of the nastiest chemicals a normie can buy. It will happily penetrate through your skin. It might penetrate your PPE if you chose unwisely. Does it burn? Nope. It just dissolves your fucking bones. If you buy glass etchant, also buy a tube of calcium gluconate and keep it nearby while using the glass etch. If you spill some etchant on you, rinse the area for a few minutes and then apply the calcium gluconate to attract and neutralize the HF. Source: I used to fill and train others to fill 40L tanks of 50% HF for cleaning semiconductor wafers.