Glass Scratch Removal FAQs

Gforce Glass Scratch Removal
Frequently Asked Questions 

Here are answers to some of the questions we are often asked about the Gforce system:

Why is Gforce a wet sanding system instead of dry?

A wet system allows for the smoothest possible sanding and the best results. The water also helps to keep the glass cool, thus allowing you to continue working.

Isn’t it messier than dry sanding?
No. You can easily contain the mess with a painters tape scratch dam, or with one of our reusable Splash Guards. Dry sanding causes a dust mess that can be more difficult to contain.  Glass dust is a serious health threat, and can complicate job sites due to stringent OSHA safety requirements.

What types of glass does the Gforce system work on?
It works on all types of glass including tempered, annealed, laminated (windshields and hurricane glass), Low-E, bulletproof and even curved glass and mirrors.

Can I use it on tinted glass?
Yes, as long as it isn’t a film tint. Usually you can identify film tints by looking closely at the side of the glass for a film edge.  Most tinted panes will have an identification marking in one of the corners on the glass.

Why is the Gforce better than the old Felt Bob polishing systems used in manufacturing and fabrication plants?
Unlike the cumbersome Felt Bob systems, Gforce will polish with distortion-free results. The system is lightweight and portable, so it can be used virtually anywhere and by anyone with very minimal training.  The Felt Bob systems are typically operated by someone that has acquired expertise to help minimize the distortion.

How long does it take?
Polishing out light to medium scratches can take 3-10 minutes. Of course, the larger and deeper the scratch, the longer the process is.

How much compound should I use?
You should only apply a paper-thin layer of compound on the polishing disk, otherwise compound is wasted, and using too much compound can slow the repair process.

How often should I take the temperature?
Take the temperature every couple of minutes in the beginning. Look at the temperature chart to make sure you are in the optimum range for the type of glass you’re working on.  Too much heat can “bake” the compound on the glass, or break the glass. Not enough heat can slow down the entire repair process.

How do I know if I’m using the right amount of pressure?
It should only be about 20 pounds of pressure. Watch the training video on this because it demonstrates the sound the machine makes when you are applying too much or too little pressure.  The proper amount of pressure will also keep you in the optimum temperature range.

Why does it matter if my disk has a little dirt on it?
You want to make sure your polishing disks and compound do not have any contaminants in them. A small amount of dirt or sand can quickly turn a repair into a nightmare. Just one grain of sand can create new scratches within seconds while using a high-speed polisher.

What type of scratches do I need the abrading module for?
Any scratch that your fingernail can catch in.  We recommend trying to polish out the majority of all scratches to ensure a distortion free repair, but time restraints will sometimes warrant using the abrading process.  The amount of visible distortion on a deep scratch repair is determined by the technicians experience level.

How many times should I practice before doing a real job?
Watch the training videos and then practice a couple times on a scrap piece of glass.  There are a few different types of practice scratches discussed in the manual. For the abrading process of removing heavy damage, you will need to practice several times to get the technique just right.


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