Share a little about the materials, processes, and techniques used to create this cake RK Carriage & Gumpaste Decorations. Airbrushed in Pearl Dust. What are you most proud of? The Carriage & Ruffles What advice would you give someone starting this project? The bottom tier is 12"...make sure you have plenty of time set aside to do do Ruffles...took me 6 hrs!!! It was worth it though!!