I put each of my cakes on their own cardboard circle before stacking them or putting them on the foamcore board I use for the base. I have been covering the cardboards with Press n Seal but it seems to be a very unprofessional way to do it. Now that my business is picking up and I am selling alot more cakes, I was wondering what other way there is to cover them. What do professionals use? I know they make waxed cake circles that are only waxed on one side but not sure how it would be having the unwaxed surface against another cake.

I'm not a pro, but I use two masonite boards glued together ( 1/2 inch thick) then covered in fondant. You can use any kind of heavy board that will not bend.

When I am doing a stacked cake I put each tier on cake board and then that board is set directly on the cake. If they are selling the cake board to hold cakes they would be safe no matter which side is touching the cake.

I use Wilton boards.

www.designmeacake.com (mod edited to provide working link) has a tutorial where she glues wax paper to the cake board on both sides. trim them to fit and wallah (or however its spelled lol)

Sorry for my inaccurate post above. I hastily read the question. I thought you were talking about a cake base board for the bottom of the cake.