I have seen Smart repair guys using Jewelers Rouge for removing scratches https://www.amazon.co.uk/s/?ie=UTF8&keywords=jeweler%27s+rouge&tag=googhydr-21&index=aps&hvadid=155857412796&hvpos=1t1&hvnetw=g&hvrand=14820066036959363331&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9044988&hvtargid=kwd-51904010&ref=pd_sl_8xz60jupx7_e
On plastic?
Plastic and glass, like anything I would always try something on a similar product or small area first to see how it comes out.
@lynx started
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I have seen Smart repair guys using Jewelers Rouge for removing scratches https://www.amazon.co.uk/s/?ie=UTF8&keywords=jeweler%27s+rouge&tag=googhydr-21&index=aps&hvadid=155857412796&hvpos=1t1&hvnetw=g&hvrand=14820066036959363331&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9044988&hvtargid=kwd-51904010&ref=pd_sl_8xz60jupx7_e