I'm so confused when reading about fondant, royal, mm and buttercream.I would like to have plainly written what is what, why and especially when making flowers what to use and how long they can be stored for and used.I'm pretty sure if fondant is used for flowers shold last a long time. But, what about buttercream decorations? How far ahead can they be made before I should use them.So, in a nut shell what are the differences, how do they work and what and how long should...