Gandalf, you mean cloak of Captain, isn't it? Good question, how? I don't know, because I missed a right position in first attempt and I had repaint it almost whole.

I tried imagine, how cloak wrinkles(?) and where is the middle. I tried made some points and draw basic shapes. I have lack of drawing skills, so I had repair a lots of shapes and lines. The black base of the cloak helped me many. Rest of it is only painting as normal with exception the flat surface

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Thanx Canny, I'm not planning use pure black on the armor and white only as final highlights. Yea Angel's book is good inspiration source. I tried follow his direction, but his using of airbrush is madness. I'm miles away from his skills with airbrush. I tried make some final highlights and totally ruined three previous layers. So almost all of highlights are made by brush on my model.
About book. I have only book Eavy Metal Masterclass and Angel's book, so not too much compare, how this books must looks like. It is first Angel's book and I think some mistakes were made.
1. Instructions follow all painting steps, but on many pictures are visible changes, not mentioned in the text and most of them are ignored completely. It is understandable, because of complexity of some models, but he often repeating same steps again and for some parts is no place there.
2. I feel some pictures should be bigger, some should be smaller with focus to one part.
3. If I'm right, it is eleven tutorials there and three of them are ugly busts. Biggest error for me. He is known for his Infinity models, maybe he can prove, that it is not about them. Unnecessary.
4. He showing some nice converted models(tags), but no unpainted ones are visible there, so conversions are hidden.
If you moved over this, it is good book. Especially with the miniature of Joan

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