Quick question about painting these guys

Hi,

I've just printed out my first few sprues, and I'm wondering how to go about painting them. I have painted quite a few Irregular Miniatures 2mm blocks, but they have some detail to enable me to see where the different colours should go, such as arms, legs and heads, etc. I'm not much of an artist, so I'd struggle a bit to know how high up the "figure" to put flesh colour for faces, for example.

Can anyone point me to any painting guides for these figures?

Thanks in advance

Biker500