Actually you were right, coloring that kind of art is very hard.
First, you got a very nice concept, with very nice lineart, forms and such.
But yeah, coloring is the hardest part XD
I gave it a try but it's really too weird...eeh...sorry XD
Attachment 46660
bottom part is where I added some details on top... Try to do the same for middle,maybe you'll be lucky, I don't have the time right now, sorry again