My Ex-housekeeper....used vinegar on my dark rust marble floors and it etched lines and spot all over. I had a pro come in and try to buff it out but it didn't work. I have several marble floors and I use Windex without vinegar dilluted in a bucket of warm water. Thats my 2c worth. Nancy

I used polished carrara on my last bathroom remodel and it does, indeed, etch pretty badly. There's a polish powder you can buy online but I never used it. At any rate ... HONED ;)

You need documentation no matter what comes next. You need all your in-progress photos, all texts and emails between you and contractor, the contract, the texts and emails from the tile people, printed out manufacturer’s instructions for the waterproofing materials he used such as wall boards and pan liner, texts and emails from the local rep for the manufacture (if you contacted them), etc, etc. Buy the TCNA handbook and read the shower chapters. Ask for a meeting. In meeting explain what your concerns are and cite all the things that he did wrong, with in-progress photos and cross-referencing all the violations to the standards, codes and instructions. Ask what his plan is for re-building the shower. If he refuses, ask him does that mean he’s quitting the project? If he says yes, that means he has quit, you did not fire him, document/confirm that in an email. If he says no he’s not quitting, then tell him remedying this situation is part of the project, so ask him which day he’s coming over to demo and re-build it. He may quit at that point. If he does try to re-built it, if/after that fix fails, you can fire him. Then send a demand letter certified return receipt asking for full refund plus the cost that you will have to pay to hire a new tile professional to demo and re-build (use local averages or get actual bids). Cite all the violations like you did in the meeting with the references. We had to do all this stuff when our GC quit rather than fix the issues. It’s a PITA but we got double our money back. Read my “Project Goes South” post, you might find some helpful info in there. Now, if you don’t have any of the documentation I listed above, don’t have a contract, etc, etc, I don’t know what leverage you have. You can still have the meeting and send the demand letter, but if it goes to court documentation is your friend and you want max documentation. Hopefully you can dig up some photos of the waterproofing process involving both the floor and the walls. If you don’t have much, add this to your meeting: ask the contractor to simply explain each step (like he’s teaching you) he used to build your shower, starting with framing. Then write down every word he says, asking him to slow down or repeat if needed. Don’t correct or challenge anything he says; let him explain his process. That can substitute a little bit for your lack of other documentation. Then you can cross reference any wrong info he told you to the codes, standards and manufacturer’s instructions, and proceed from there with demand letter. If he refuses your demand letter, which he will, you can decide about suing him. In my state justice court (small claims) is non-binding. We didn’t sue our GC, but he sued us saying we fired wrongfully him. We responded with counter-suit in District Court and asked that the lower case get rolled up to that level because of the $ amount and we wanted a binding decision. It’s a pain and I hope we never have to talk to a judge again, but we had to respond to quit-GCs suit and go through the process. Best of luck to you.

I wish I could tell you. Didn't end well with contractor, unfortunately, and I'm not sure what he used. The tile store sent over FILAMP90 with the order but he didn't want to use that. (:-(