[Nordicus]

What if you painted a Chaos Marine like this: Black basecoat, silver drybrush (in however many layers), Blood for the Blood God as the primary armor color, washed with red/glazed with red.

It probably won't work that well, as 'Blood for the Bloodgod' is quite good at covering what's underneath. In my experience anyway.

If you want that blood-with-silver-in-it-look what you could do was mix it with leadbelcher for that deep steel look.