Apply a few thin layers of Moot Green over top of the white
Being careful to avoid the recesses between the coils, paint from about halfway down the coils to the top of the coils using a thin layer of Warpstone Glow
Paint the very top of the coils using a thing layer of Caliban Green , again being careful to avoid the recesses between the coils
Apply a mix of 1:1 Lahmian Medium and Flash Gitz Yellow to the very bottom of the coils. Let it pool a little and use a brush to draw it up into the coils, about halfway, in a sort of bell curve shape.
Repeat the previous step, this time drawing the paint about 1/4 of the way up the coils
Thin down a mix of 2:1 Bold Titanium White and Flash Gitz Yellow using Lahmian Medium and apply it to the very deepest recesses at the bottom of the coils, focusing towards the center