Re: best materials for shower w/iron-rich water
If you have rust staining problems, then use rust colored products. There are plenty of tile options available in a mottled brown/red color, as well as complimentary grout colors that will hide the majority of rust stain issues. Be sure to seal unglazed tile and most importantly the grout.
You could go solid surface with a cultured product or natural stone, you'll still end up with a tile shower pan or fiberglass though.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!