Scratch Away polishing paste heavy ‘Red’ for removing deep scratches out of glass combined with the the metal disk 93061 and 93100 paste pink you can erase scratches which are in the glass.
Deep scratch removal in 3 steps
With the metal disk and paste red (partno: 93110) grind away glass to reach the same depth as the scratch.
Requires a clean metal disk and the paste pink (partno: 93100) to level the depth difference between the grinded and not grinded area of the glass in order to minimize distortion which makes it a lens.
Requires the Scratch Away glass polishing disk (partno: 93054) to polish the overall surface clear again.
Keep in mind that taking out deep scratches requires enough space to level out.