When I layer cakes (with a seperate cake board under each) and then I take of the top layer, it is pulling all of my buttercream off of the bottom layer. I basically then have to serve the bottom layer with no icing!! Any suggestions?
Sprinkle coconut flakes where the cake board will sit before you put it on.
How are you supporting the other layers. If you are using dowel sticks I would make them slightly longer so that when you place the next layer on it will sit on the supports and not on the the icing.
Thats what they did to my wedding cake and it works great, unless you have someone who doesnt like coconut. In my wilton class, the instructor had us cut a cirlce of waxed paper to put under the board, then you lift off the tier and peel away the wax paper, works fine. I've done it on some of my cakes.
You can also use dounut sugar between your layers.
ps sugar should work just fine.