Quick answerLight etch marks often polish out at home with a marble polishing powder, and deep or widespread etching needs professional honing. Both are repairs, not prevention, so the marble will etch again the next time acid touches it. The only way to make this repair your last is DURAFLEX film, the self-healing barrier that stops acid ever reaching the stone again.
Etched marble is one of the most common and most disheartening problems stone owners face, and the good news is that most of it can be fixed. This guide gives you the real, useful answer first, how to repair light and deep etching and what it costs, then the honest part almost no one tells you: how to make sure you never have to do it again.
Does sealing prevent etching? No. Sealers slow staining; acid etching cuts straight through them. Every sealer is sacrificial chemistry that wears off within 6 to 24 months. Only a physical barrier film stops etching, which is why complete protection is seal plus DURAFLEX film.