This reciple is taken from somewhat incomplete notes. Most models don't need most of these steps but I wanted to make it easy to tell guns at a glance so there are a lot of options for that. Most of this was done with an airbrush but some notes may be a little off on brush vs airbrush.
Hulls
- Prime   Black  
 - Airbrush   Rough Iron  
 - Gloss varnish
 - Wash with   Red Brown Filter (Filter for Wood)  
 - Drybrush   Bronze  
 
Wood
- Base coat   Bold Titanium White  
 - Paint   Gore-grunta Fur  
 
Water
- Base coat   Elfic Blue  
 - Paint   Leviadon Blue  
 - Highlight   Sunrise Blue  
 - Highlight   Bold Titanium White  
 
Portholes
- Paint   Verdigris  
 - Highlight   Bold Titanium White  
 
Heat exhausts
- Base coat   Hot Orange  
 - Highlight   Fluorescent Orange  
 
Hand painted power generators
- Base coat   Magic Blue  
 - Highlight   Fluorescent Blue  
 
Airbrushed power generators
- Airbrush   Sapphire Gem  
 - Highlight   Crystal Blue  
 - Highlight   Ionic Blue  
 
Particle Weapons - Red
- Airbrush   Dragon Red  
 - Airbrush   Wyrmling Red  
 - Airbrush white ink
 
Aetheric Weapons - Green
- Airbrush   Ruinous Spell  
 - Airbrush   Wizards Orb  
 - Airbrush   Potion Green  
 
Pulse Weapons - Blue
- Airbrush   Hydra Turquoise  
 - Airbrush   Phantasmal Blue  
 - Airbrush 50:50   Phantasmal Blue  & white ink
 
Purple Guns
- Airbrush?   Alien Purple  
 - Airbrush white ink
 - Airbrush   Violet Volt  
 - White dot
 
Yellow Guns
- Airbrush   Meteor Rock  
 - Airbrush   Moon Dust  
 
"That gun with a lot of holes"
- Airbrush   Incursion Orange  
 - Airbrush   Daemonic Yellow  
 
"AI Stuff"
- Airbrush   Greenskin  
 - Airbrush white ink
 - Airbrush   Gauss Green  
 
Whales
- Basecoat   Charcoal  
 - Highlight   Neutral Grey  
 - Use black wash
 
Finishing Steps
- Matte varnish