Question about the shortning with cream cheese by the guy in Texas, does it oxidize?
Also, The idea of rolled fondant over the buttercream works great.
Just two weeks ago I had a cake made just that way, I could not put it in the fridge for a while because it was jammed packed with all my catering stuff, but it did eventually get chilled, then I pulled it out 45 minutes before I served it and it held up like a dream.