Start with a the lightest color in your scheme and spray the entire stand. Then spray streaks of successively darker colors. Finally, cut out a pattern of an oak leaf from plastic sheet, or whatever leaf grows natively in your area, and lay the pattern on a portion of the stand. Finally, take black paint and lightly spray around the edges of the pattern. Lift the leaf and repeat all over the stand. You may have to wipe off the leaf from time to time to prevent dripping. You'll get a shadow effect that hides pretty well, especially if you choose base colors that are prominent in your neck of the woods during your primary hunting season.

The key is to not use too much black and only create the outlines of the leaves. Also, if you want to do it right, rough up the existing basecoat and spray first with some auto primer, but you probably already knew that.

Good luck,

Fritz