Ha 10 asked me yesterday it's just three paints here I'll copy and paste the txt I sent
Cheers mate (brushes away a tear)
Just the normal mix but I've thinned right down.
Base is Snakebite leather 3 very thin layers to give coverage but not obscure detail.
Then a 50/50 water to army painter dark shade all over to darken it down although badab black will do as well but DONT use the new GW black wash it's shit.
Then very thinly reapply snakebite leather over most of the figure but leaving darkest areas. I did very thin application just a moist brush and quite dilute.
Then snakebite plus Vallejo pure white just a dot of white to the mix kept very thinned almost a glaze then just keep on going like that adding more and more white to the mix covering smaller areas until your at almost white but not quite.
The only different thing I've been doing is thinning down a lot more and far more layers maybe 20 or so from base to finish. So paints just 3 snakebite white and the black wash.
Hope this helps.