When painting figures with complex uniforms, I often look for examples on the internet of how others have painted them to inform my approach. In this case, I found very few examples of these figures. Thus, I thought I'd offer a study of my own production to add to the collective consciousness.
Having a Prussian Napoleonic army, I was partial to the idea of doing the Blucher Hussars for the FPW, their namesake providing a nice bridge between the eras. Another thing that caused me to do this particular unit was that their uniforms weren't just "red" but described as "crab red"--a distinctive color that has been variously represented as bordering on brown. To get a unique dark red, I used Testor's Model Master British Crimson as a base (yes, I still paint with enamels--Humbrol being a mainstay along with Testor's Model Master line).
I was also very concerned about getting the lace on the attilas to stand out, a signature look of the post-napoleonic hussar rig. The white lace against the dark red jacket worked well in that regard. Getting the officer's silver distinctions to stand out was more of a challenge, especially on the silver-red cross belt. Rather than silver, I used steel for the officer's distinctions (on top of black for the jacket lace and shoulder loops), and then I brushed them over with silver to add shine. I hope these images are of some use to some other painter.