I used the recipe here called 'faux fondant crusting buttercream II'. http://cakecentral.com/recipes/1597/crusting-buttercream-faux-fondant-ii/comment-page-1#comment-3874And yes, my cakes were cool. I had baked them a few days before and froze them. I just saw someone's post that they had problems with the sweating too. I guess I'll have to find a different crusting recipe.