I fixed the monochromatic mistakes from earlier by adding color (gasp). I used a liberal application of Seraphim Sepia to the recesses to give the illusion of shadow and tie the skin into the armor. I also added armor plates on the hips, knees and shoulders to make it look less like a gargoyle and more like a 40k Daemon Prince. I also added a loin cloth to cover up his naughty bits.
In the end, I think it turned out well. I am happy enough to field it but it is not likely to be a first string model. It will likely ride the bench except for Apocalypse games and if I field a CSM flying circus.
I especially like the negative space created by the raised base and the wings. I also like how I bent the wings rather than leave them flat.
I dislike the overall blackness and obvious pieced-together look of the mini. The armor bits stand out in a bad way from the rest of the mini. Overall, it looks like a conversion and no conversion should be that obvious if done well.