I agree with you guys .Just want to add I have seen worse. Toughest part is stripping the coatings off. You have to get down to the clay. Then make any needed repairs.
Then cleaning the grout lines possibly consider color sealing them.
In most cases you need to use a penetrating sealer to seal the clay and bring out the colors. That first sealer needs to allow you to place a topical over it as well. Doing a job like this will require off days in between drying out the clay from the initial stripping to waiting a day for the first sealer to cure. Then of-course will you be able to get the proper pricing for doing this work .

Sent from my iPhone

> On Aug 4, 2019, at 10:43 PM, <sealwerxwa@bigpond.com> <sealwerxwa@bigpond.com> wrote:
>
> Hi There From Perth Down under, in our experience in dealing with terracotta
> tiles, the coating/glaze on the tiles has been removed with some sort of
> chemical, this is impossible to patch up, you have to completely remove all
> the glaze off the tiles until you have a raw tile, then you apply new
> coatings, you need to prime the tiles as they are so porous it just drinks
> and drinks the sealer.
> It's a very messy job, the results are not very good overall, you have to
> protect everything, you cant price the work high enough to validate the
> costs.
> So my advise is do not do this unless you are 100% confidant, you have
> priced it well.
>
> Good luck.
>
>
>
> Garry Barton
> Managing Director
> 15 Ruse St Osborne Park WA 6017
> M 0400 362360
> E sealwerxwa@bigpond.com
> W Sealwerxwa.com.au
>
>
>
> -----Original Message-----
> From: sccpartners@stoneandtilepros.simplelists.com
> <sccpartners@stoneandtilepros.simplelists.com> On Behalf Of Mark Winslow
> Sent: Friday, 2 August 2019 7:32 PM
> To: Stoneandtilepros <sccpartners@stoneandtilepros.simplelists.com>
> Subject: Tile
>
> Have a client that said her house cleaner used bleach or something on her
> tile, I have never done these tiles before but read they can be a pain, she
> is wanting to know if can be restored or best to cover up instead of tearing
> out. Thank you for your help
>
>
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