Hi James,
glad to hear your friend decided to go for the original which I, personally, find a great picture of a stunning girl!!...
The results posted in both your Threads are very good, but I don't think you can get an absolute 'natural' reconstruction and look and anything 'unnatural' would spoil your great picture!!!
... Your skin retouch is simply great!!!
P.S. Since they are about the same topic, I'm going to merge your Threads ....