I tried it and had some trouble. But I think it's because I used all shortening buttercream and didn't freeze it long enough, and I used waxed paper. My trouble was that it stuck to the paper because it was too soft.
I am taking the Wilton class and we have to use the all Crisco icing, which is so awful. I tried adding salt, butter flavor, and then even almond, and it's just disgusting stuff.