stedi Hobby Model Polishing Tools 4 PCS, Ultimate Precision Files #10000 Grit Glass Mirror Grinding Tools for Plastic Gundam Models, Wood, Resin-Base Parts.

These polish the plastic & make it lok shiny... https://www.amazon.com.au/dp/B0CFLKZX6B?ref=ppx_pop_mob_ap_share

It's the 4pc set on this page: https://www.amazon.com/stedi-Hobby-Polishing-Mirror-Grinding/dp/B0CFLKZX6B