So I’ve done hard water removal at a few places using One-Restore. Haven’t had any issues removing them before until today. Did a site today and used my same method 4 times and it was getting better each time, but wasn’t completely removing it. I got about 80% of it up, but I still want the perfect glass. Spoke to one of the managers who said the hard water stains had been there 4 plus years and they weren’t expecting it to come all the way off. Being the perfectionist I am I want to get them completely off because thats what I said I would do. My ratio is 1 gallon of one-restore to 3/4 gallon of water. Is there another method or a different compound that will remove hard water stains that have been there for several years? Are there instances where hard water stains are impossible to completely remove and what are those instants? Thank you for the help.
Hard water will actually etch into the glass. The longer it stays on the glass the deeper it etched. There is some stains you can’t remove with chemical cleaners.
Me hard water and glass renu have products that can cut the etch. They use polishers and a paste type cleaner to really dig into the hard water.
I read and seen video on some buffer machines. I’m a little sceptical on another site I’m doing that has hard water stains for well over 5 years, And those windows are 4 stories up.
What is the time limit on removing hard water stains from a window using a chemical cleaner? Just so when I’m doing an estimate I can be absolutely sure I can remove it based on how long the stain has been there.
With Glass Renu there is none.
What about with one restore.?
[MENTION=10998]SoCalKpow[/MENTION]
This is the nuclear bomb - Winsol Crystal Clear 550 | Window Cleaning Supplies, Tools, Equipment, Products
We will use that when One Restore doesnt work…
… And it’s highly radioactive so use all the proper protective gear for eyes, skin, and lungs.
Will it give me super powers?
Thank you Chris. I will try it.
I use straight one restore no dilution let it dwell with out drying use a white pad to scrub
then wash off
That stuff can burn glass, be careful!
I tried a small section with straight one-restore and it didn’t do any better then my ratio I put up earlier.
I always test a small section before I go all out with any new product I use.
scrub? elbow grease?
I’ve removed some nasty stuff but you could be dealing with worse
Elbowed it so good my arm is killing me.
You should do this with every new window, or at least new location, even if you’ve used the chemical a thousand times.
Each window has its own situation.
Look up “tin side” of glass.
You also have to worry about window coatings that are sometimes on the exterior side of the glass.
[MENTION=10998]SoCalKpow[/MENTION]
Unfortunately not 
Check this article out, its about my buddy WCR BIll - What You Don
WOW. I can’t believe he did not wear gloves with such a strong chemical product. All precautions are always worth the effort.
I hate one restore. I would rather bust out my polisher from j flint than use one restore.
