Levi,
i did a ambush scheme (of sorts) on my Panther G for the group build last winter.
i did a couple different things for my 'dots'
mine were actually more like falling leaves, and if i were to do it again,
i would make them smaller & do more of them
that being said - i did some by putting little triangles of silly putty aon the model after the base coat of dunkelgelb was on. these 'stick on masks' went in sections where the green & red brown were to go. apply them gently so as not to deform them.
i rolled out the silly putty on a sheet of glass w/ an z-acto handle into a thin sheet and then cut it into strips. cutting the strips at angles gave me little (but not little enough i decided later!) triangles. after the other coats are on, you remove them gently w/ a rounded wooden toothpick to reveal the dark yellow beneath.
then i took a 3x5 card and used a new x-acto blade to cut a few triangle holes in it.
cut a single triangle, and then a group of two or 3.
you can then use the red-brown and the green to spray more leaves over the parts
of the tank that are still yellow. it is up to you whether you want to put some green leaves on the red and some red leaves on the green parts.
all that being said, you could paint the tank in the 3 color camo and then
just put the leaves, dots, stripes on w/ a micro-brush (trade name for handy little
tools that your hobby shop should sell).
i did the green stripes on my Pak 40
(see the towed gun GB page http://members.tripod.com/towedgun/builds.html )
w/ a micro brush and was very pleased w/ the result.
on the Tony Greenland book, checck Amazon - some times there are used copies available for much less than a new one. i got mine for 14 or $16!!