Quote: Originally Posted by
detailman1
I have been a detailer for 25 years.The quickest and most effective hard water removal is hydroflouric acid.Spray on wet cool surface dwell for 90 seconds rinse and all hard water is gone.Be careful on glass as the acid will etch the glass.It is commonly known as aluminum brightener.Remember to wear gloves,goggles and respirator as this is a very nasty chemical.If you buy wire wheel cleaner at your local auto parts store read the label and look for hydrophlouric acid.This dilution generally will