Second day I owned my new CX-30 I wiped some dust off with a dry towel and you'd have thought I used 200 grit sand paper. Luckily I was able to get the scratches out with a microfiber cloth and Novus plastic polish I had for other projects. Here's a good kit of it:

https://www.amazon.com/NOVUS-PK2-2-Plastic-Scratch-Remover-Bottles/dp/B000B4UGZE

My scratches weren't so deep and I got away with only using #2 (a few times), then #1, but it might be worth getting all three steps just in case:

https://www.amazon.com/Novus-7136-Plastic-Polish-Kit/dp/B002UD0GIG