I do mine on the stainless steel sink in the kitchen.Ceramic sinks would be just as resistant in case of spills.I do my etching in sealed food containers to prevent spills.You can leave the chemicals in the sealed container till you need them again.Food grade plastics are proof against the etchants just make sure anything used is marked "not for food use".Ive seen no staining or marking on the surfaces and as its on the drainer if anything does spill its easy to dilute and wash down the sink.Gordon
Not much so far, but if washed it down quickly.Now battery acid is another matter, as was the glare I got from the wife.Gordon
Some stainless steels do react with acid, note - 'stainless' refers to many different alloys.There are systems where the acid etching is done sealed inside a zip-loc bag, then afterwards you pour in a neutralizing powder to turn the acid into harmless solid. Perhaps this is more possible for you?
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