Hard water stain

[v10ford99]

Hear are some showers I put in my parents house about 1 year ago for that good famly price of free. But now I have to go clean them they have hard water stains. What has worked for you guys.
http://i174.photobucket.com/albums/w120/f-250ford/P6290057-1.jpg
http://i174.photobucket.com/albums/w120/f-250ford/P6110017-1.jpg

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[Davestone]

You could use a geberal soap scum remover on the honed stones probably with little damage and rinse well, but they are usually acid based.MB makes some that aren't, try mb2 or his soap scum remover....http://www.mygranitecare.com/granite-marble.html