When I repainted my car, I removed the side trim by drilling out all the rivets. Scuffed it, primed it and used Krylon Satin Black. I think it provides one of the best satin black finishes. I used this on the emblems as well. The windshield trim being an early 71 was left on the car and painted in place. The door frames were painted while the doors were off the car but left in place. It has held up well and can be touched up easily with a small brush or toothpick.
I would suggest you buy a few "satin" blacks to try them. I found a few way too thin. The Krylon is a bit thicker. If you paint it on a warm day in the sun, it dries fast and provides a nice finish.