Dab stencil brush into one green color and blot off excess on paper until brush is almost dry. Dab brush over leaves. Repeat with next three green colors, one on top of the other. Dab second stenciling brush into one color, blot off excess on paper, then dab over grapes. Repeat process with other five grape colors.
Variations enhance the look.
Remove stencil and move to next spot, taping in place. Step back and view pattern you're creating. Mix dark, but muted green for veining on leaves from green colors on first palette. With fine brush, paint in veins on leaves. Hold brush by end and push along, standing back as you work.