You should definitely cover the cake board with decorative foil so you won't have the 'grease ring' from the icing.
* It depends on what ingredients are in the icing, and if the cake has fillings between the layers.
* If the ingredients require refrigeration, then that’s what needs to happen. The cake may be boxed, but DO NOT wrap it. You don’t want to destroy all your hard work! Just place an open box of baking soda in the frig to absorb all the phantom “funky” odors.
* A decorated cake can sit out for a couple of days without much of a problem, except colors may start to “bleed” into each other. Meringue Powder added to your icing will slow the process down a bit, but I like to avoid adding it if at all possible.
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