Every single one of my cakes lives in the refrigerator until the moment I deliver it ~ regardless of buttercream, fondant and gum paste used, and I’ve never had a problem.
The cake in my profile pic was covered in gum paste flowers, they did just fine. You may notice the flowers or fondant get a slight sheen or very mild condensation as the cake comes to room temperature, but just leave it alone and it will dry out fine. If you touch it, you’ll leave fingerprints!
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