Maybe he threw a meshsmooth over something with a lot of poly's. That can sometimes throw things out a little bit. It happened with the nose of my boeing 737-200.
If you did, use less poly, THEN apply a mesh smooth to the areas you want to smooth out.
But don't apply it more than once, otherwise you will have some seriously high (for lomac standards) poly model.
That skin is improving lol but it kinda looks like you've just pasted your reference material onto the UV Map and left it.
No worries if you did, but you might want to sharpen up those edges.