I camo my caches by first spray painting them a flat brown or dark green. Then I take leaves of varying sizes, shapes, and species and hold them up to the surface im painting. I also use sticks, straw, etc...
I then take other shades of brown, green, black and tan and spray paint around the leaf from a distance in quick spurts to make a hazy but visible outline around the leaf. I keep doing this over and over and over until I achieve the desired effect, which usually looks like a professionally done camo job.
I'll post a picture shortly.
Smoke