“My skin is super sensitive ... But it also features muriatic acid (a form of hydrochloric acid) in ultra-low concentrations ...

It’s not like etching with hydrochloric acid and peroxide is anything new ... and the etchant seemed pretty gentle when it accidentally got on his skin. Sounds like a win all around.

Strong acids such as hydrochloric acid, sulfuric acid and nitric acid are ... a warning symbol to show that they can irritate your skin or cause some other minor harm to health.