This is my take on the paint scheme of the Sect of the Red Echo, a thrallband of the Thousand Sons featured in the Thousand Sons Codex for 8th Ed. 40k.

The main colours are blue and gold.

General Information:

My general method is to lay down all the base colours for the model, then do all the shading in the recesses before moving on to the highlights.

I don't own an airbrush, so the recipe will mainly consist of brush on paints.

Priming:

I find the metallic sprays from GW tend to be a little on the transparent side, so an initial undercoat of grey helps.

1. Prime the model lightly with Mechanicus Standard Grey
2. Prime over that with Retributor Armour

Gold (Armour Trim):

I generally start with the armour trim so that any time I get paint on another piece its easy to cover later.

1. Drybrush over the model with Retributor Armour to even out the colour
2. Shade the recesses and around any rivets with Agrax Earthshade
3. Highlight fine points and sharp edges with Stormhost Silver

Blue (Armour Panels):

1. Base with Sotek Green
2. Shade the recesses with Nuln Oil
3. Highlight the edges with Temple Guard Blue
4. Highlight fine points with Baharroth Blue

Pink (Details - Cloth, Wraps, Lenses):

1. Base with Screamer Pink
2. Shade the recesses with Agrax Earthshade
3. Highlight the edges with Pink Horror
4. Highlight fine points with Fulgrim Pink

Brown (Details - Leather Pouches):

1. Base with Rhinox Hide
2. Shade the recesses with Agrax Earthshade
3. Roughly highlight the edges with Skrag Brown
4. Add a fine highlight with Ushabti Bone

Black (Details - Armour Ribbing, Weapon Casing):

1. Base with Abaddon Black
2. Highlight the edges with Eshin Grey
3. Highlight fine points with Dawnstone

Beige (Details - Horns):

1. Base with Rakarth Flesh
2. Layer upper half with Skrag Brown
3. Shade over with Agrax Earthshade
4. Highlight the edges with Screaming Skull
5. Add Abaddon Black to the tips

Silver (Details - Weapons, Chains):

For grenades, replace Nuln Oil with Athonian Camoshade

1. Base with Leadbelcher
2. Shade the recesses with Nuln Oil
3. Highlight the edges with Stormhost Silver