This method uses Citadel Contrast paints as a "base coat" for Infinity models (inspired by the work of The Tabletop Artist on Youtube). I then work my way up using regular layering and highlighting. Typically the first layer is lighter in value, but sometimes not because of how contrast paint behaves (very light higlights and very dark recess shading).

Prime

1. Spray prime using Uniform Grey and then zenithal using Matt White Undercoat

Leather for bags, straps, etc

1. Snakebite Leather
2. *depending on how thick the snakebite coat goes on, this cold be the Desert Yellow on the lighter end of things, or Golden Brown the darker end of things (but beware Golden Brown is almost glaze level consistency)

Leather on uniform/boots

1. Blood Angels Red
2. Parasite Brown

Pants and uniform

1. Akhelian Green but I think that this might be coming in slightly too green and am going to try another base, possibly Stormfiend ?
2. look up color #, autocomplete not working

Body armor

1. Space Wolves Grey
2. Pale Grey Blue