Hi

Have made DS's dinosaur cake for his party tomorrow and have iced with ready made (roll out) white icing which I have coloured green (coz its a dinosaur colour???). However because of the shape of cake I had to roll the icing in smaller lots. Any tips on how i can blend the joins? I am sure there is something simple out there I just don't know it

Also best way to store overnight. I currently have on a cake board. Cake is rich Devils Food Cake.
Thanks