Polishing stains from glass

Try C.L.R it's probably calcium builup.

CLR might work. If not try a VERY mild abrasive ,brasso,silvo, cut and polish,even toothpaste can remove stains and faint rub marks from the surface of glass.Go easy with the rubbing and take your time.
Only use this method on side windows. Polishing out marks on the front one can produce a mild lens effect which poses problems when headlights are coming towards you.

Glass that is left to the elements can develop a water stain that no amount of rubbing will remove. This mainly happens when whole crates of window glass are left out in the weather without protection, but can occur on vehicle glass too.

I make kiln-formed glass work for a living,most of it has to go through a toughening process for use in houses. This process adds subtle scuff marks,almost like a stain, to the smooth side. I use cut and polish for the majority of them and it works fine.

Rust converter or vinegar should get rid of the stains and liquid jiff will get rid of anything else, just don't use a scouring pad.

Have a good one

G'day david

I had some water marks in the side window of my Nissan and when I asked the window tint place who redid a rear window what to use they gave me a small bottle of "jewellers rouge" - lapidists ? (rock polishers) use it for a final polish. It took a bit of rubbing but all water marks gone.

Good luck with it

Cheers

Enjo glass cloth, yes they do work :)

Tried every product I could find. Geez didn't know we had collected so much different products that seem to do the same thing.

Tried the lot from coffee machine descaler, all the household products you could think of, toothepaste, wet fine ash etc etc.

The only thing that worked was 2,000 grit wet and dry sand paper using CLR as the wetting agent. Still some very faint marks but acceptable.

Give Gumption a shot

Novus is supposed to be good stuff.