I have completed 2 test figures and have done 3/4 of the block painting on the rest of the unit (20 figures inc Command)
This is the basic block painted figure.
The figure on the left has a wash of Devlan Mud on the cloths, followed by a highlight of Iyanden Darksun.
The figure on the right got a wash with Army Painter Soft Tone. It is shiny but well protected and still needs a spray of matt varnish.
I am impressed by the protection the Army painter system provides the figures. While the Standard approach gives more depth and a ragged look, I prefer the colour of the Army Painted figure. I still think I am wiping off too much of the wash when I apply it. No dout I will improve with use.
So the Army Painter method it is for Sand Goblins.