This is a polishing disk that is coated with a water soluble polymer loaded with various superabrasive powders. It works by releasing the polymer and superabrasive simultaneously when wet with water. The first step is to apply a good amount of soapy water to a clean window surface that is stained by hard water spots. Then start polishing with the W.A.D. or Water Activated Disk. The polymer will start to break down with the water, releasing just the right amount of powder/slurry. If you clear the glass with a squeegee after a minute you will see how much time is needed to remove the stains completely. Then proceed with your work. You can polish the entire window, then soap and squeegee for inspection. If the window looks good you might fog it to see if all of the spots have been completely removed. If they have you can seal the glass with whatever hydrophobe you choose.
WADs can be created from different water soluble polymers, and different polishing abrasive powders of varying particle types and sizes. Even diamond can be used. What is critically important along with the details just discussed, is the use of the right rotary polishing wheel. The one I have developed is both gyroscopic and has a 12 degree (fail safe) variable shaft. That is it has an outer edge that weighs much more than the rest of the wheel owing to six large holes cut around the center point. It is six inches in diameter with a universal joint fixed between the wheel center point and the drive shaft that fits into the chuck of most any drill motor. Also it is made from 1/4 inch aluminum alloy. The hard felt rings and polishing disks used have a pressure sensitive adhesive to temporarily secure them to the bottom of the wheel.
The purpose of the wheel design is to remain flat on the glass at all times. This completely eliminates what I call "the bobbing effect". Which helps to eliminate the problem of abrasion haze, and maximizes the effectiveness and efficiency of the WAD. Of course the same is also true if one were to use a polishing ring made from hard felt. Such rings increase the contact pressure and so optimize the speed with which the polishing compond is able to remove the hard water spots. Different compounds are applied directly to the contact surface of the rings a little at a time. The window is copiously wet with soapy water. The wheel is next put up to the window and turned on. You should polish about a couple square feet at a time. If you limit the amount of compound applied to the rings you will also limit how much will need to be removed from the window when done. In most cases all you will need to do when done polishing is rewet the window with your cleaning solution and squeegee it off. There should be virtually no messy compound left behind to remove. This greatly reduces the amount of time to clear a window. It also greatly reduces the amount of compound used per window, and hence the cost of product to completely clear each window.
This is a revolutionary new technology for removing hard water spots from window glass. Owing to the fact that there are spots out there that will come off with a finger nail, and others that require a jackhammer;...each stain removal/restoration job will be different. I do not foresee a one solution kit available any time soon. Although I do see an enormous amount of room for product development. Such as liquid coatings loaded with superabrasive powders that could be applied to different disks and rings. Such would be water based of course and would dry to the touch within a few hours. Once dry they could be put to use immediately. A product like this would give both the manufacturer and the user fantastic diversity. It is this type of product that I am now going to pursue. If you would like to become a beta tester for any of the products mentioned in this post, or any others as they are developed;...please just send me your name and email.
Written by Henry Grover Jr.
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