I have had a local wedding planner contact me and ask if i would do a fake wedding cake for her to put in her shop. I have only done one cake with dummies and I iced the cake with buttercream before putting the fondant on. I am worried that if i give her a dummy cake the buttercream will go bad or something? Do you think you could maybe use something else under the fondant to help it stick to the dummies?
TIA!!

You could just spray the dummies with water. The fondant will stick to that.

oh i never thought of that! thanks!

I have done several cake dummies for wedding shows and used the Wilton canned BC to ice before putting on the fondant. Some of those dummies I have had for over a year and I have not had a problem. I do use the Wilton icing for the dummies, simply because it would cost more to make the icing and I am also not going to use perfectly good, fresh BC for a dummy cake.

I used shortening before and the fondant stuck just fine, 2 months later and its still stuck like glue sitting on my shelf

Perfect! thanks for the tips!!

I find Piping Gel works best, and its very tacky so the fondant will stick very well and won't go anywhere. You'll also avoid air bubbles forming later. Good Luck!

Piping gel works fine too.