I assume you will first cover cake normally with first fondant color, and then put top fondant on, then stripes, then RI piping. How do you get the top fondant to be so perfectly scalloped?
That's what it looks like to me. Beautiful cake.
The scallops are probably not as perfect as you think they are...thats what the dot border on the scallops are for! Icing hides a magnitude of sins
I have done this once I rolled my fondant placed my cake pan on it lightly marked it (this would be the underside) I then removed the pan and with a large round cookie cutter I placed it in the center of the pan mark and pressed down on the outside half of the cutter I repeated all around. I then used my mini pizza cutter to cut out the sections that hadn't been cut all the way, flipped the whole thing over and rubbed the edges smooth and then placed it on the cake.