Her basic argument is you have to look at hair almost as though it were a solid metal helmit, with the one difference that you should always paint in the direction of the hair. Then afterwards you can look at the individual strands. Multiple layers of highlights and washes until you are happy, get bored, run out of time, or are so annoyed you throw the mini through the window.
So armed with this class, you can naturally expect that when I do get my slot in the speed painting contest, the mini was a hairless snake dude. lol
Not that it would have mattered, that hair class was almost two hours long, and not the 45 minutes one gets to speed paint a mini.