I have my marble sealed with Dupont bullet. I squeegee, wipe down the fixtures and run the fan for about 30 min after a shower. So far so good. I have not had any rust stains yet but have only been using the shower for about two weeks.

Thank you Sofla, enjoy it. Despite all the warnings from staining and etching , I love the look of this real marble . I'll take the chance and cross my fingers.

I haven't had any problems. But not all marbles are the same, and I know nothing about polar white. I used Senguard sealer by Cosentino, which I got from my local marble/granite yard. It's really expensive, but he claims it's the best, and it's all he recommends for calacatta, statuary, venetino, and other white marbles.

I use a marble cleaner (something with the appropriate pH), and I squeegee the wall tile maybe once every other week. I clean the floor and the lower level of wall tile around the perimeter with a scrub pad and the marble cleaner to remove soap residue.

Good luck.

Thank you KevinMP , I'll try to look for that sealant. How do you apply it without damaging your shower fixtures ?

13 years ago i moved into new build with a marble shower... it had both a dk verdi marble and a lighter, whitish marble in it-don't know the type... i don't know if the shower was sealed by the tile installers, but only lived in that house less than 3 years and some areas in the shower had significant etching... i had used a 'marble safe' cleaner on it and nothing else...

2 1/2 yrs ago we had our current shower redone in marble... had it sealed and resealed it twice (about once a year...) and it looks perfect, so i assume sealing it is key... (and using a marble safe cleaner when cleaning!) tho the type of marble used might also be a factor...?

I think that the marble kind , the sealant and how often you seal it are all key factors in the marble up keep. Thank you and I hope your marble stays that way for a very long time .