There are some specific pads and a silca based polish that can 'improve' defects in the glass. But like paint the depth of the defect determains the level of correction possible.
I have used this setup to remove water spots and to smooth over some minor chipping. Good luck.
On a car that size to cut and polish as well as an interior detail... 8-10 man hours easy... could be as much as 16 if the paint is jacked up. $400 to $800 in this market.
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