Question about Apple iPad Air 2

The touch screen is already bonded to the display, but the screen itself is under the glass. Polishing depends on the type and depth of the scratches. Fine scratches can certainly be removed, but if they are coarser, I would leave them alone. The glass is specially coated so that there are fewer fingerprints and when he polishes it, he removes them. The result is that you see marks more quickly and the glass surface no longer looks uniform.