I did my trim in high gloss white. Did it myself--was easy to do, rather than buying. Remove pieces--all easy and straight forward. But dont try to remove the vent bezels until you watch the how-to on youtube. Very easy once you see the video, but youre liable to break a tab of you just try to pry it off.
Just need to lightly sand; clean very well, then spray. Flat with lots of thin layers of clear coat. Attached pics (terrible pics, but you get the idea).
Doubt the pictures ones in black are powder coated. Powder gets bonded and baked to metal, I believe.