Teatime Coconut Layer Cake

INGREDIENTS

• Vegetable-oil cooking spray
• 3 1/3 cups sifted cake flour (not self-rising)
• 2 1/4 cups superfine sugar
• 3/4 teaspoon baking soda
• Salt
• 3/4 cup vegetable oil
• 11 large eggs, separated, plus 3 egg whites
• 1 teaspoon pure vanilla extract
• 3/4 cup granulated sugar
• 1/4 cup cream of coconut
• Coconut Meringue Buttercream
• 1 cup sweetened flaked coconut
• 2/3 cup unsweetened coconut shavings, for garnish