The other half of the guide is all about the marine chapters. Part 1 is here.
These markings were all over the metal marines of this era.
Those wolf badges are a pain to paint but I've seen it done.
I still remember nothing about the Salamanders from this era.
And the guide wraps up with some handy banners which I am sure I have seen in use before, though it's been a very long time. I do remember a time when every marine army had some on the table. Sure it's kind of archaic, but it looks really nice. Ah well.