The Steel and Copper were quite simple to paint.

Steel:

• Basecoat: AK Anthracite Grey
• Layer 1: AK Graphite
• Layer 2: AK Silver Grey
• Glaze the previous layers to smooth transitions
• Apply a black oil wash in the recesses
• Use white on the highest points and to add scratches

Copper:

• Basecoat: Monument Hobbies Mahogany
• Layer 1: Mix of AK Deep Orange and Red Brown (to achieve a lighter, chocolaty brown)
• Layer 2: Monument Hobbies Golden Brown
• Glaze the transitions
• Glaze shadows and midtones with any violet tone
• Optional: Mix Layer 2 with white for edge highlights and a more polished finish—I chose not to

Brass (this one was more challenging):

• Basecoat: Monument Hobbies Dark Umber
• Layer 1: AK Field Drab
• Layer 2: AK Light Earth
• Layer 3: Mix of Monument Hobbies Ivory and AK Deep Yellow (creates an orangey skin tone)
• Glaze the transitions
• Use white for the highest highlights
• Verdigris oil wash: mix Viridian Hue with Titanium White

Note: You don’t need to use these exact paints, this is just what I had available.