Picked up 5 of these really cheap on Ebay.
Wasnt planning of even using them but decided to paint one anyway.
Very happy with the result and will be painting the other 4 and using them in my army list!
I have chosen a slightly different colour scheme for these guys as opposed to the rest of my army.
My logic here/fluff here is they are emulating the greater daemons wing colour, being essentially a unit who wants to fly themselves...
Cheers.