Not a thousand times, more like four or five. And I think I say something different every time. So to continue that tradition...
I don't really have a recipe, more of a list of ingredients, and I mess about with them until it looks right. This is my "African Skin" section, which lives in a kind of Apartheid regime on the other side of the table from all my other paints:

Coat d'Arms Negro is the base colour, and I make the highlights from the other paints in the picture, just as it takes my fancy (I'm not methodical or scientific, though I wish I could be). Don't always use all of them. Mess around until it looks right. The Gryphonne Sepia wash goes on top of everything else, and is really the secret weapon of my technique. Always looks rubbish until that goes on, and then suddenly it looks like someone who knows what they're doing painted it.
It's all pretty much moot at this point however, as I don't think any of the above paints are available any more, apart from Coat d'Arms Negro. When current stocks run out, I am seriously screwed, and have no idea what the fuck I will do. Have to figure out a new system, I guess. That pot of Snakebite Leather is actually empty, and I have no more of that. Grrr...
Under the crazy name change your colours are listed below, don't know if the shade differs greatly though
Grythonne Sepia is now Seraphim Sepia
Snakebite Leather is now Balor Brown
Scorched Brown is now Rhinox Hide
Bronzed Flesh is now? How long you had that one

Dark Flesh is now Doombull Brown
Elf flesh is now Kislev Flesh