Keifer,
<<I am heavily indebted to Mssrs. Jas and Elheim for their great ACU How To's over on the Ambush Alley and Guild Forums.>>
Take a look at those to see some master work, as thats where I learned it from.
This is what I did, all numbers are Vallejo paints;
primer grey
base coat Green grey 886
wash black
touch up Green Grey 886
Stipple on Deck Tan 986
Stipple on Lt Rubber 305
touch up stippling of colors until happy with look
To stipple, I tore a chunk of foam from a miniature blister with an irregular surface, dabbed it in the paint, dabbed a piece of paper to get of excess than dabbed the figure. It takes some getting used to, but when done right it provides a quick random pattern of paint. Its a useful technique for doing paint scrapes and rust on vehicles as well.
When happy with camo, paint flesh and details like guns, gloves, pouches and boots.
Have pictures of the real thing handy as reference.
I tried not to replicate the camo pattern but more to create the effect of it in scale.
Let me reiterate, the colors and techniques I used I got solely by looking at Jas and Elheim awesome ACU work and How To's over on the Ambush Alley and Guild Forums.