This recipe uses an airbrush for the initial stages, and normal brushes for subsequent refinement. The airbrush is absolutely not necessary, but makes the early stages quicker! I also rushed the process when making the photos; I'm sure yours will look better!
Update: I've since decided this approach is a bit to vivid for a whole army, so a more muted, less neon method is included in my Salamanders tutorial: https://paintpad.app/recipes/2325-salamanders-v0-9
- Prime the model with a cool neutral colour; I used German Panzer Grey . This model is going to end up with cool shadows and warm highlights, so a cool basetone will help.
- Basecoat the whole mini with Heavy Black Green
- From about a 45 degree angle, spray Warpstone Glow on the model for a first highlight
- Add a highlight from above with Liquitex Vivid Lime Green Ink (use Moot Green or Livery Green if you don't have this ink.
- Spray Night Blue from below to add shadows and build contrast.
- With a regular brush, add highlights with Warpstone Glow . As well as the edge highlight, you can glaze Warpstone Glow to emphasise the volumes of the model
- Add a second highlight with Moot Green , covering less area than before and only edge highlighting the more upwards facing areas.
- Add a third highlight with Livery Green , adding some final glazes to the volumes of the model, and edge highlighting the most prominent areas.
- Add final small highlights of Yellow Green (70.954) to where edges meet.
- Using thinned-down Night Blue shade the recesses of the model. You can also glaze over transitions to smooth them if you like.