I need a 1 inch dummy foam for the lids of my competition cakes.I saw some white foam at Michael's Craftstore in the floral section that was 1 inch but it is much harder and more pitted than the softer styrofoam we usually use.I'm not talking about the green oasis foam either that you soak for real flowers....Has anyone used the pitted foam for a dummy cake and if you did what did you use to cover the underneath and the small pitts??Royal icing?
Before you cover that type of foam be sure to bevel the top edge. Otherwise, it will cut a nice circle of fondant for the top.
As for the holes in the foam, royal, buttercream or Spackle will work. Buttercream with allow you to work with it sooner. Smooth it as you would a real cake.
I prefer that type of floral foam for dummies over the typical pebble foam. You can use bits of that type of foam to sand itself and I think it cuts and shapes much more easily. At the Wilton School, that is they type of foam they have for all of their dummies. I asked about getting some standard sizes from them, but they don't sell them and they only order enough for their classes The company they order from will only sell very, very large orders....so, I use them over and over again, soaking off the royal or fondant and spiffing it up with a bit of an overall sanding.
I only spackle large gouges in the foam, not the entire dummy, and I do sand the tip edge (with a piece of the same type of foam). I spritz the dummy with water and apply the fondant (about 1/6th to 1/4th inch thick).
In a pinch, you can hot glue this type of foam together to make any size dummy you need.
I use that styrofoam all the time for my dummies. If I need a different shape I buy the big sheets of it and get my dad to cut the shapes out with one of his saws.
When I cover them with fondant I take the edge of the styrofoam and press it against the counter top and kinda move it from side to side. That will round the edge and keep it from ripping your fondant. I usually don't cover it with anything if I am doing fondant, but I do roll my fondant a little thicker so that it doesn't form to dips in the styrofoam so much.