Many restoration jobs have been performed without sealing as a final finish. This causes the next deposit of hard water spots to weld to the windows. It does not matter if the windows were cleared with an acid or a cerium oxide or some other superabrasive based product.
The opposite of this is also true. If you do seal with NG1010 from Nanovations USA then the windows will be dramatically easier to clear or restore the next time around! If the job belongs to you then you have control. But if you are coming in blind then you have no idea what was done before. You might even discover going through the job that certain windows are an absolute bear to clear, while others are not. And there was no way to predict this. The reasons could be varied.
The use of a glass etchant based product like hydrofluoric acid will make it most difficult to clear the windows the next time around. Whereas not so much if a polishing compound like cerium oxide were used. It could also be that only certain windows were sealed but not all. Or it could be that a quality sealant was not used. NG1010 has been tested by some very professional restoration experts. It has shown the very best results.
Henry Grover Jr.
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