Mineral stains on exterior glass removal

fhpottery, Nov 11, 10:36pm
You know the horrible white calcium stains from hard water? It's almost etched into the glass. Iv'e tried CLR clear, oxalic acid, car polish.
Does anyone have a magic solution? The internet shows a car polisher and american products. Perhaps you might suggest a polish as it looks like a buffer job.

Thanks

daarhn, Nov 11, 10:42pm
The Water Stain Doctor EXCLUSIVE Paste

http://thewaterstaindoctor.co.nz/

golfdiver, Nov 12, 12:09am
Diamond fusion is the same sort of product isn't it? Bloody hardwork even on just a shower

pooks3, Nov 12, 3:51am
My window cleaner suggested steel wool, just like the stuff you get to clean your dishes, but it has to be the extra fine stuff which is 0000, available at mitre 10 etc , worked great for us

fhpottery, Aug 1, 11:15am
Thanks! I realised the oxalic acid I was using had been diluted 20:1 so will try it neat and see what happens. Thanks for the link that's interesting.