That is a sharp piece of DIY modification. I painted the front emblem a flat black but noticed when I removed the crappy plastic chrome it started to deteriorate on the underside and return to a regular plastic. I have an option coming down the pipe line later in the year to replace them with custom billet logos.
Back on topic... the tail chrome pieces on my black camaro would look pretty slick how you did it or with a glossy finish.
I've also been wondering what my car would look like with the body paint a matte black