hI,
I just read your request as well, I have a home that I clean, which all the bathroom in the home is grantie and marble, with the glass shower doors, I use a grantie cleaner which you can buy at your local home depot, or you may check out a janitorial store which is
www.hescoinc.com you can find all your cleaning need.
Now I use to give my marble a shine along with grantie, turtrle car wax, yes it seem a little out don't it, but hey, it shine's and it don't leave residue, or water stains, when cleaning the shower door's yes, spray the window solution on to a rag and clean your window, I have also use funiture polish on my walls in my bathroom and around the walls of my tubs as well as the car wax. I have also use windex on marble and grantie but it tends to leave a flim behind. If the three suggest solution work try it it want harm, I use them all but the one I like the best believe it or not is the funiture cleaner and the wax. I have a site which you can go look at I have posted the grantie pictures yet but I do have pictures before and after of homes I service,
www.myownhomecleaningservice.sampasite.com
go check out the pictures there I am still working on my site, but I do have a few pictures I have posted, I will also add this to my site, feel free and sign the guest book, look at the sinks I have use with my polish