Cover every surface of the model with a smooth coat of Chaos Black. Spray primer works best, but make sure you get all the nooks and crannies. Start by basecoating any scrolls and skulls with Scorched Brown. Once dry, carefully paint Boltgun Metal on the arm and leg joints, along with the boltgun, any tubing, and the backpack. If you make any mistakes, don't worry too much — just erase the error with some Chaos Black. Be sure to change your brush-cleaning water after using any metallic colours, as they leave metal flecks that will ruin other colours.

With Scab Red, very carefully paint the eyes. Continue using Scab Red to basecoat any shoulder insignia, Crusader Seals, or Black Templar crosses. Start building up the colour on the scrolls and skulls with watered-down Graveyard Earth. Using a Fine Detail Brush, very patiently fill in the shoulder pads with watered-down Fortress Grey. This process will take several careful coats, so be patient and take your time! Finally, paint any chains and a few pieces of the boltgun with Mithril Silver. Once again, change your water before continuing.

Highlight the eyes with a bit of watered-down Blood Red mixed with Scab Red. Use this highlighting combination for anything you painted Scab Red in the previous step. Continue to build up any scrolls or skulls with Kommando Khaki. Go over the Fortress Grey areas with a coat of watered-down Skull White. Again, this will take a few coats, so be very careful and patient. Your Marine is certainly good enough for gaming at this point!

Add final highlights to the skulls and scrolls with Bleached Bone. Now, we'll tackle the power-armour highlights. Using a Fine Detail Brush, carefully edge areas of the armour with very thin lines of Codex Grey. This technique is hard to put into words, so be sure to check out the pictures to get an idea of what you should be doing. Once you finish edging the armour, go back and fix any mistakes with Chaos Black. Next, heavily water down some Brown Ink and carefully paint this onto any metallic areas.

Nearly there! Using the same edging technique, apply a few lines of Fortress Grey onto the model's power armour. Lightly go back drybrush any metallic areas with Boltgun Metal or Mithril Silver. Clean out your water and then feel free to add cool details like tiny script onto the power armour. Get a good point on your brush, dip it in some Skull White, and add a tiny drop of it to the outer corner of each eye. This will produce a reflective glass effect. Once you're all done, paint the model's base. Don't worry too much if you get some brown onto the model's armour - after all, items painted black are really hard to keep clean in real life, so it makes sense that the Initiate might have picked up some dust during battle.