W
William Sommerwerck
Guest
Which acid or acids? Decades before I saw "Breaking Bad", I knew thatAcids are what's used to etch porcelain bathtubs for "refinishing"
with epoxy paints. Even leaving chlorine bleach solution puddled
on the tub surface will etch it -- I found that out the hard way.
hydrofluoric acid attacked glass and porcelain. But hydrochloric?