I did this one some time ago:
I quite like how it turned out. The key to the process is supposed to be cool, teal shadows and warm highlights.
Here's my second attempt:
The effect can be seen if you compare it to the original:
I'm not sure I have it down yet - I think I need some more work. The two examples I have here I have used a teal tone for the shadows and I'm thinking something a little more cyan might work better. I think I could also try a darker tone - in the second image, the highlight hue is warmer and the overlay lighter, so I reduced the opacity to keep it from going too light. but I'm thinking that isn't the way to go. I ended up adding a tone-control layer to keep highlights in check.
I think that the way to do this is:
- flatten all
- prepare luminosity masks
- apply colours with said masks
More in the future, probably.