See now, that's a nice simple guideline, exactly the sort of thing I was looking for, and do you think I could find one anywhere else? No. It's all very well having wonderful painting tutorials and Aphotic shots, but noone seems to think about these complicated models and the assembly problems they might give novice painters anymore.
Anyway, thanks for that, it's genuinely improved my confidence for tackling the big gribbly. Now if only I could find that can of Skull White spray...