Yes, if I correctly understand what you mean by "grazing" as surface scratching.
But you have to be very careful in doing so, the two big issues are chemical attack from the polish causing later life micro crazing within the stressed parts of the window [ that being like where it is moulded into shape], and secondly from overheating issues if you use a powered buffer too aggressively.
Whilst some metal and domestic polishes can be safely used, chemically, some can't and you are well advised to only use polishes very specifically blended for use on "Acrylic" .
The issue with others does not usually appear in the short term but sometime later, even several months when an effect their chemicals have on the structure of the plastic becomes evident, and is irreversible. In the areas where the plastic has inbuilt stressing, like where shaped into bends, these stresses are relieved by the plastic cracking on a micro scale leading to a rash of "silvery" minute flecks. The plastic fracturing where hitherto it was simply stressed.
There are several online clips dealing with how to do this polishing, best seek out and watch a few, one of the better was by the late John Wickersham.
Basically, it is using the right stuff, be gentle, slow so the plastic can't get hot and using progressively finer grade abrasives if dealing with deeper scratching is involved.
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