Good effort. The thick paint on the horns detracts a lot from the overall look. Thinning the paint with water and applying a couple of thin coats instead of one thick one would go a long way toward a more even and tidy look. The metals seem very bright too. Finding a way to take the edge off the "gleam" (maybe with a very thin brown/black wash) would help a lot. Your brown tones are pretty decent - they're the best part of the paint job, I think.