On Jul 31, 11:22*am, Oren wrote:
On Tue, 31 Jul 2012 05:51:00 -0700 (PDT), gpsman

wrote:
You're going to have to use muriatic acid

Do not use "muriatic acid".

"Nyuh-uh" is the type of penetrating analysis that makes Usenet so
special.

There is a tile cleaner, Sulfamic acid made for cleaning tile haze.
Made by Tile-Lab and found in the local borg.

That's glycolic acid. I doubt it will touch it, but it (probably)
can't hurt to try.
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- gpsman