Preparation: Thoroughly wash and clean all the shells you intend to use. Heat the food grade composi mold gradually until it melts completely.
Step 1: Place the washed shell in a pliable container. I have used a silicone spoon rest here. Pour the melted composi mold over the shell, until it is fully immersed in the mold. Allow the mold to set for 20-30 mins at room temperature.
Step 2: Release the mold from the container used.
Step 3: Detach the shell by slowly peeling it from the mold, leaving behind it's impression.
Step 5: Alternatively you can also paint over white fondant or gum paste shells using food coloring, to get a more natural look.