This video describes how to paint the armour NMM with red reflections for Garrett from Cult of Paint.
The following paints were used:
Games Workshop: Corvus Black, Baharroth Blue, Mephiston Red, Wild Rider Red, Troll Slayer Orange
Vallejo: Neutral Grey (Mechanicum Standard Grey), Pale Grey Blue (Blue Horrow)
P3: Morrow White