Glass Restoration Blog

Glass Restoration System

posted Nov 3, 2010, 7:53 AM by Judah Clark   [ updated Apr 6, 2016, 9:13 AM ]

Presto Restoration Products has just completed The Glass ReSurfacer System which has everything needed for one glass restoration technician to be completely self sufficient for 1 to 2 weeks before needing to be resupplied with product and pads. This system is also perfect for providing test areas for buildings in hopes of landing a glass restoration project. 

The system utilizes the Glass ReSurfacer Final Polish with the Glass ReSurfacer Pad that produces the finest finish available for architectural window glass. This complete glass restoration kit is available for purchase online and can be shipped worldwide. 

This system is not meant for deep scratch removal but will easily remove light scratches such as ones caused by abrasive glass stain removal products or burns in the glass surface from using Hydrofluoric acids. 

How to Get Hard Water Stains Off Glass

posted Mar 7, 2010, 5:31 AM by Judah Clark   [ updated Apr 6, 2016, 9:14 AM ]

If you want to know how to get hard water stains off glass, you have come to the right place. There are many different products that can be selected to remove hard water stains off glass but to know which one to choose requires knowing what caused the stain in the first place. First, is it really a hard water stain?

There are about 5 different types of glass stains commonly found on glass surfaces
  1. Oils Based Stains
  2. Soap Scum Stains
  3. Mineral Stains
  4. Acid Burns
  5. Surface Scratches
The main difference in them all, in regards to restoration, is if what ever is causing the optical distortion/stain has damaged the surface of the glass or is just remaining on the surface and is difficult to remove. 

Typical Causes of These Types of Glass Stains

Oils Based Stains

  • Oily waterproofing over spray
  • Silicone or urethane caulk leaching
  • Leaching from paints or coatings 
Soap Scum Stains

  • Hard water and soap combine to cause scum
  • Window cleaning process using dish washing detergents

Mineral Stains

  • Leaching from unprotected precast or GFRC concrete
  • Contact with tap water such as sprinkler system over spray

Acid Burns

  • Cleaning with harsh acidic cleaners

Surface Scratches

  • Cleaning with harsh abrasive cleaners
  • Scrapers improperly used to remove debris

How to Remove Hard Water Stains Off Glass


Oil Based Stains 

Oil based stains do not damage the surface of the glass and can be removed with a product that breaks down and absorbs the oils from the surface revealing a perfectly clean glass surface. For this application we recommend Presto's Glass ReSurfacer Final Polish or EnviRestore Glass Stain Remover. These products can be used with a rag to gently scrub the surface of the glass and will remove any type of oils stains easily and quickly. These products contain no acids and no harch abrasives.

Soap Scum Stains

Soap scum stains cans be difficult to remove depending on how hard the hard water is and how long the stains have been allowed to build up on the surface. This type of stain and how hard it is to remove is in between a mineral stain (The hardest to remove) and a oil based stain (The easiest) because it's a mixture of minerals from the tap water and residues from soap. For this application we would also recommend Presto's Glass ReSurfacer Final Polish or EnviRestore Glass Stain Remover. These products can be used with a rag to gently scrub the surface of the glass and will remove any type of glass stains.

Mineral Stains

Mineral stains are the most difficult to remove because the minerals bond to the surface of the glass and create a tenacious bond to the surface. This is due to the fact that the stains are the same materials as the glass mainly silica, magnesium, and calcium. The best way to remove mineral type stains from glass is to sand the glass surface down to remove the stains and effected surface to reveal a completely brand new glass finish which sound more complicated than t really is. For this application we recommend Presto's Glass ReSurfacer Final Polish with a variable speed polisher and the Glass ReSurfacer Pad This product and process uses the same type of materials that are in the stains, and the glass surface to scratch the surface of the glass at a level that is undetectable with the naked eye, even under magnification.

Acid Burns

Acid burns are most commonly caused by the use of hydrofluoric acid. This type of product is most commonly used on glass to remove stains and it does work however about 25% of the time it burns the surface of the glass and causes the need to perform a second restoration step to remove the acid burns. Again, we would recommend  Presto's Glass ReSurfacer Final Polish with a variable speed polisher and the Glass ReSurfacer Pad. This process will sand the surface of the glass down including the acid etched or burned layers revealing a new highly polish and imperfection free finish on the glass surface.

Surface Scratches

Surface scratch can because by any type of abrasive materials that are harder than the glass surface. Sand is the most common reason for scratches and it is forced into the surface by means of items such as scrapers. Another common reason for surface scratching is harsh abrasive products used to remove stains from glass. How abrasive is too abrasive for glass? If you take a small mount of product on your finger nail and rub it against another finger nail you will feel the abrasiveness of the product. If it feels gritty and scratches the surface of your fingernail it will most likly scratch the surface of glass. Again, we would recommend  Presto's Glass ReSurfacer Final Polish with a variable speed polisher and the Glass ReSurfacer Pad. This process will sand the surface of the glass down including the acid etched or burned layers revealing a new highly polish and imperfection free finish on the glass surface. If the scratches are really deep and can be felt by rubbing your finger nail on the glass surface, we recommend a glass scratch removal system. 
























Glass Stain

posted Mar 3, 2010, 6:08 PM by Judah Clark   [ updated Apr 6, 2016, 9:13 AM ]

The glass stain is a problem that effects just about every commercial office building in the world. Window glass is so clean and clear when its new but it doesn't take long when exposed to the elements to get the mysterious glass stains. Where does the glass stain come from? How do you remove the glass stain? How do you prevent the glass stain from returning? 

Below are 12 different pictures of glass stains from commercial office buildings around the country.


Fortunately, you have come to the right place. Presto Restoration Products has dedicated the past decade into learning why glass stains form, how to remove glass stains without damaging the surface of the glass and preventing the glass stains through eliminating every cause that we have found to develop glass stains on commercial office buildings.

Where does the glass stain come from?

  • Buildup of surfactants (soap scum) and oils from sticky window cleaning detergents that attract dust and dirt

  • Use of high mineral content tap water during window cleaning

  • Water errosion carries minerals from adjacent concrete or precast surfaces
  • Contact with high mineral content water through sprinkler systems

  • Overspray from careless waterproofing and painting projects

  • Leaching of deteriorating caulking or coatings

  • Leaching of contaminates from adjacent rusting metals

  • Leaching of failed UV-sensitive, water-repellant performance

  • Atmospheric pollutants including acid rain, dust or other man-made environmental pollution


How do you remove the glass stain?

By Using High Performance Glass Restoration Products such as the following two products by Presto Restoration Products

Glass ReSurfacer® Final Polish: Effectively removes stage 1 and 2 corrosion, surface scratches, oxidation, erosion channels, mineral deposits, calcium stains, lime stains, efflorescence, soap scum, acidic graffiti, oils, everyday grime and buildup, etching, acid burns, acid rain and other flaws from architectural glass surfaces; designed for use with a motorized polisher, random orbital sander or white, synthetic, non-abrasive pad to produce a scratch-free and highly reflective finish on a wide variety of glass surfaces

EnviRestore® Glass Stain Remover: A restorative cream that removes stubborn stains from glass surfaces without the use of machinery; effectively removes stage 1 corrosion and many stains caused by soap scum, stone sealer overspray, caulking residue, mineral deposits, calcium stains, lime deposits, lime run, lime scale, oils, grease, oxidization, exhaust stains, GFRC leaching and more

How do you prevent the glass stain from returning?

By using a high performance glass protective treatment

The Glass Defender Series is a combination of products designed for the protection of architectural glass surfaces. The polymers in the Glass Defender Series are high performance hybrid silicone materials. These materials are partially inorganic, and will not easily break down due to UV degredation. Typical glass protective treatments, on the other hand, consist of organic polymers that quickly break down when exposed to UV degredation. 

Glass Defender® HD: High-performance, invisible coating that protects glass from damaging elements and prevents scratching for up to 20 years

Glass Defender® MD: High-performance, invisible coating that protects glass from damaging elements and prevents scratching for up to 10 years

Glass Defender® Primer: Increases performance life of Glass Defender MD up to 10 years and Glass Defender HD up to 20 years


"GLASS STAIN"

Remove Hard Water Stains on Glass

posted Mar 3, 2010, 5:57 PM by Judah Clark   [ updated Apr 6, 2016, 9:14 AM ]

To remove hard water stains on glass can be a difficult process and should only be performed by a professional especially if the piece of glass is expensive. It is easy to damage the surface of the glass and cause the need for a more expensive restoration process to remove the damage caused by the failed restoration attempt. 

Below is a picture of damaged glass by failed restoration.
If after that warning you still think you have what it takes to give it a try, make sure you use a product that has detailed instructions such as the Glass ReSurfacer Final Polish. Click here to download the product data sheet with instructions how to and what not to do when restoring glass.

Clean Glass Stains

posted Mar 3, 2010, 5:50 PM by Judah Clark   [ updated Apr 6, 2016, 9:13 AM ]

Unfortunately, you can't clean glass stains. If the imperfections in the glass are stubborn enough that they can't be removed with standard cleaning the glass requires restoration in which there are numerous products available on the market. 

One such product that is very easy to use is the Glass ReSurfacer Final Polish that can be used a number of ways depending on the type of staining. It can be used with a sponge or rag for light stains, a white synthetic non abrasive pad for medium stains and the Glass ReSurfacer Pad and a motorized polisher for difficult to remove stains or when there is a good amount of glass to restore.

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