Here is an interesting link. How to grind a mirror, the complete video - YouTube I don’t know if it will work for you from this post. But it took me to a site on youtube on mirror making. The process they used of course was quite involved because they were creating a uniform curve. Also they were working on a horizontal surface. What I found interesting however was that the process involved four steps. The first three were done dry with a carborundum powder of 80, 120, and 220 grit. The last or fourth step used a cerium oxide wet. A lap was created that conformed perfectly to the curve of the mirror blank. This pitch lap then was used for fine grinding/polishing of the mirror. When pressure was applied it caused the cerium to superheat the glass on an atomic level. Which made the glass flow into the micropores or as was mentioned the frosted pits.
If you go to the youtube site you will find several variations of this technique. But the point that I am making here is that this technology is in fact a very old one. Windows used to be polished with a large machine back in the fifties on both sides. This was plate glass. Before the float glass process was developed. What some very smart people have done recently is adapt this technology for scratch removal, etched glass restoration, and mineral deposit removal. They have done very well. And likely have even found ways to improve it.
It therefore makes sense to use circular disks embedded with microscopic particles used dry. Several steps would be necessary. The first being the longest. Then the final step would involve a cerium that would leave a very smooth surface. A reflective surface. Distortion can be eliminated even for deep scratches by working a larger area first and then working down. 80 grit particles are said to be about 1/3 millimeter. So if a mirror blank can be customized to have a specific curvature, it only stands to reason that a flat surface can be maintained flat while removing a scratch.
I am expecting that certain eyes will be watching these posts as I move into this technology. Please know that I have the greatest respect for everything you have done. And I wish you the very best always.
