Wyrd can say its skin all they want, and I'll file it away in the same category as "Greedo always shot first, you just didn't notice because of.... uhh... cropping". My guess is someone painted the towel "flesh" colored for the card/book and they rolled with it and made it cannon. The original mini's art had it clearly as a towel (and its looks to be separate from her on the new one too), To me, it looks silly as skin, since its the wrong size, shape, and really makes no sense of what she's doing with it.
When I give advice, I try and keep it within the person's skill level to something relatively easily achievable. A baby step up if you will. So I'm not going to say "hey, that cloak is a pretty flat area, why don't you do some free hand on it" when they're struggling with basic shading.