An even worse one isvhosuehold rust / lime stain remover; some of it contains hydrofluoric acid which can penetrate some types of gloves, go through your skin,

An even worse one isvhosuehold rust / lime stain remover; some of it contains hydrofluoric acid which can penetrate some types of gloves, go through your skin, and damage your bones. And you won't feel anything for a few hours. It's unbelievable to me that such a solution can be sold as a household chemical when there are far safer alternatives.