Here you go Ol'Mike...
Started by painting the entire stock with a base color (in this case it's sage green... for experimental purposes only)
Then I use some plastic grass as a stencil (stolen from one of the wife's flower arangements)...
Here's the stock after the 1st layer of Olive Green. You can see that I changed the angle/direction of the grass while I painted. I don't create an entire coat... just paint particular areas.
Then, a layer of Tan (still using the grass stencil) over the other two layers of paint... On the Sendero stock I used only two colors: Olive Green, and Khaqui (both Krylon Fusion Camo).
Last step... because the tan is such high contrast I like to mute it a little with a light over coat of the Olive using the grass as a stencil again. You can do as many layers as you like... I feel a couple of layers gives good depth to the camo... only you can decide when it's right.
I'm no expert at painting... and I don't really like the way this one turned out... mostly because of the Sage base color. But, you can at least see how I did the painting. Here's another bonus... I already stripped all the paint off of this stock so I can try it again, finally... something I can't totally screw up!
I think I like the two color camo (like the Sendero) better than 3 colors. Although, there's about 15 coats on the Sendero... so maybe that's why it looks so much better. Anyhoo... give me a shout if you want more detail. Or hell, send me a stock and I'll paint it up for you... I'll only charge you a box of bullets.