QUESTION

How can I get acid stains off from bathroom tile? It has white spots.

ANSWER

ANSWER - Generally speaking with some glazed ceramic tiles, which porcelain tile is a ceramic tile, or with some geological types of stone, they can etch when subjected to acid or some substance that is acidic.

For glazed tile there isn't much you can do about it, as the acid changes the structure of the glaze.

For natural stones, you can regrind or polish the stone to remove the etched stains.