Roll out the modeling compound with a rolling pin to 1/8-inch thickness. Turn the compound regularly to keep it from sticking to the pin and rolling surface.
Use cookie cutters to cut leaves and acorns. Use the crafts knife to create veins in the leaves and crosshatch details on the acorn caps.
If making napkin rings, refer to Napkin Ring instructions. Otherwise, proceed as follows: Lightly spray-paint the shapes, layering colors for a variegated effect. You can spray colors over each other while wet. Spray the backs of shapes that will be used for place cards and stemware trims. Let dry.