Combo For 2.0 non turbo.
https://www.ebay.com/itm/Genuine-OEM-Honda-Civic-2-0L-Non-Turbo-Air-Cabin-Filter-Set-2016-2018-2dr-4dr-/153279995194?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0
Sold by a honda dealer
every time you polish, you take off a little bit of clear coat.
if you want to know if those scratches can be polished out, spray some water to make it wet. if you cant see the scratch when it's wet, it means you can polish it out.