So I had a chance with the louvers off and roof apart to do something I have wanted to for quite some time now. My louvers were nice and baked, a faded gray. I had cleaned part of them up by using a polishing compound to cut through the upper layer of paint. They still did not look the best in sunlight though, and the grills on the lower level were still faded.

Just put them up against a wall, sanded them with 400 grit paper, clean them down with rubbing alcohol, and spray several light coats of SEM Trim Black on them. After letting them dry overnight I washed them down with water to remove anything left from the paint. Here is a picture of halfway through the job: