Silver parts of Death Guard units such as weapons and metal bits of their models.

1. Cover Death Guard model's silver pieces with 2 thin layers of Leadbelcher
2. Do a light wash using Agrax Earthshade to darken the armor. Optionally, you can add a second layer of Agrax Earthshade to darken the trim even more.
3. Finally, Edge Highlight using Runefang Steel
4. To conclude your model (do this step after painting the whole model), using Streaking Grime to cover the whole model and let it rest for about 15 minutes.
5. After 15 minutes are up, use something like a eyeshadow brush in combination of AK White Spirit to gently wipe off Streaking Grime off the the majority of the model.