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2 years, 9 months ago

Stains on my window glass

We have terrible stains on our window glass for quite some time now. Tried different products, like calcium remover for coffee makers, saltpeter remover, etc. but nothing works.

Someone told me that they are coming from a product that's in the mortar of our brick walls and that you can only scrape it off, but that's amost infeasible.

Anyone other suggestions?
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aleghart | 2 years, 9 months ago
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Acid (like CLR or other cleaners) would normally dissolve hard water stains. If this is deposit of limestone/calcium...not just water spots...then scraping is the way to go.

Why is it "unfeasible"?

Small areas can be done with a single-edged razor blade, pennies per blade because they come in boxes of 100. For larger areas, buy a razor scraper at your local hardware store. You slide in the same single-edged razor blade.

Don't use a paint scraper, as you are likely to apply too much pressure and scratch the glass.

Spritz with water or window cleaner and scrape slowly and lightly with the blade as close to parallel to the window as possile. The solid material wll pop off the glass because it doesn't have much bonding strength compared to a steel blade.

Don't use harsh chemicals hile scraping, as they will eventually burn your hands. The water is to lubricate, preventing you from scratching the glass, and to carry away the gunk you just scraped off.

If you keep the glass wet, it will go pretty fast. Two of us did a whole room of 9-foot tall windows in under half and hour. It was 2-year-old paint overspray.

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lucg | 2 years, 9 months ago Report

This looks like a good manual. We tried some scraping before but we have a complete 30ft wall of glass where we have the problem, that's why I call it "unfeasible" - you might call it hard work. But we didn't wet the glass when trying, so I'll give that a try.

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tawni | 2 years, 9 months ago
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Safety Klean by Prosco would work well in this case and they also offer a number of cleaning solutions that may help http://www.prosoco.com/ProductList.asp?m=1&i=2

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alirex | 2 years, 9 months ago
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you can use newspaper to clean the glasses , paper is best for cleaning material of glass

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googamooga | 2 years, 9 months ago
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I found a site with pictures of similar looking stains on glass and different options to remove them. Options range from manually polishing the glass, to using a cleaner called "Crystal Clear", which is what the site is trying to sell you.
http://www.winsol.com/550.htm

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