Yeah, i did that, Adarias. Here's the progress so far:
As you can see, I initially rendered the muscles with a certain degree of definition, but as i started adding the texture, i just went with the most significant volumes, ignoring the smaller muscles. This was because by looking at my references on lizard skin, i could see that it doesn't stick to the muscle in the same way as human skin does: it's thicker, there are a few ruffles (like extra skin) and there's frequently a layer of fat that makes it rounder around the muscle. I wanted to have a trim, muscular look, while not making it look too "human skin with scales on top".
Your interpretation looks great though, i'll pay special attention to the scaly version, the highlights give a nice shine to it (though the scales are too big for what i'm after, but it's still helpful).
Thanks!