So admittedly, I'm late to the party and have only read the first book. But that does make the descriptions fairly fresh, and the Cinna stuff is making me slightly bonkers. The main detail we get for his stylistic bent is that the only augmentation he makes to his own face is a striking application of gold eyeliner.

Now, I'm going to reason from my own experience as a creamy-pinkish person. When I wear gold eyeliner, it creates a subtle effect. One doesn't say, wow, she's wearing gold eyeliner! They say, wow, her eyes really stand out in that outfit (this is my stylistic bent - barely noticeable!). So, in order for the same eyeliner to have a dramatic effect, the skin it is applied to would have to offer way more contrast.

In real time, this made Lenny's casting seem very common sense to me. Unfortunately, common sense isn't all that common. Solution: gold eyeliner for everyone! For SCIENCE!