I'm going to use the corn syrup/vodka method to make a cake shiny.  Do you need to wait until the fondant is completely dry before painting on?

It is my preference to let my fondant covered cake sit about a couple of hours before I decorate further. 

Thanks Ropalma

do you leave for a couple of hours before you add any decoration?

Not sure what you mean by "do I leave for a couple of hours".  I just keep doing things around the house and go back to decorating.