I'm doing my first wedding cake and I'm not sure what to sit the cake on. I usually wrap my cake board (my husband cut several round boards from plywood) with aluminum foil, but I don't want to do that with a wedding cake. Is there something I can use to cover the board with?

I use freezer paper (you can find it with the foil, etc in the store) shiny side up. It's stronger than any other covering and neutral in color (not that it will be seen).

I use foamcore boards covered with fondant, and a ribbon glued around the edge.

I've done a variety of things. Silver colored boards, gold colored boards, fondant covered boards, or a wacky cake stand! And a lot of peopel place them on the silver/nickle plateaus.

Colored florist foil.

I'm very new to this but I can say I don't like the silver plateaus they look so dated... I think the foamcore is a great idea, much more modern.

designer gift wrap.

I go to Home Depot, or Walmart and buy white contact paper. The home stores have wider rolls. Cheap, clean, and easy. I always place my bottom tier on a cake board then onto the contact paper covered foam core board with ribbon. Depending on size, I double or triple the foam layers. And add finger room "feet" with scraps underneath, or in my pics I used square candle holders, upside down, with petals inside. If you add feet, support edges where cake actually sits, and in the center...after all it is foam board. I can make a board under $10 feet and all. I find the brides like the board clean and neat.
Blessings~