It is hard to explain because in my country we don't have polyclay, I'm only guessing what polyclay is.
I used modeling paste , it behaves like clay and comes in 2 colors white and brown, (I used white one). Item that is ready should dray for 12h but I used microwave what made hand crack
. When hand was ready i painted it with several coats of nail polish when it was dray I made henna designs with fine marker.
You can see that it is weary primitive variation on original idea
Thank you for all the good words and sorry for my English, I hope you could understand something from that