Starting off, let's look at the paints.
These are in reverse order, oops.
- Incubi Darkness
- Kabalite Green
- Warpstone Glow
- Biel-Tan Green
- Sybarite Green
- Moot Green
- Ulthuan Grey
The third layer is Warpstone glow. Kind of the same deal. Just wetbrush the stuff right on. Just be a teensy bit more careful here. You'll want to be able to see all three colours, more or less. No need to worry about details. Spirits are pretty random. As long as the colours largely conform to expectations, it's no issue.
Next up is the wash. Get out your Biel-Tan Green. Apply directly to model. Work it into every detail. This will give your spirit a nice blended green tone from dark to bright. Take a little care that it doesn't pool too much though. You'll get bubbles rather than blends if it does. Wash it all, then go over with a clean brush to soak back up some of the excess wash.
Bonus tip: if you want to blend the energy into the rest of the model, this is where you do it. Put a little of the wash over the non-spirit model. Once that's dry, thin out some more Biel-Tan, 3:2 Biel and thinner. Put this quite far up on the model and all the way down to the spirit. After drying, put another layer of the same a bit further down, and repeat even further down for the last. Should give you a dark, smooth transition.
You're half-way! Four layers and four different paints. Your spirits are looking suitably random, but now it's time to push the quality up a notch. If you're speedpainting, you could end here, but don't. You won't regret it.
That's it for the guide. Hopefully that was easy to follow. If you have any questions, feel free to ask me :)