I am doing a fairly large cake and putting it on a piece of plywood, any ideas of what to cover it with besides tin foil because that would look tacky with the cake or fondant because it would take too much to cover it and expensive. Any ideas, thanks so much!!

How about a piece of flannel backed tablecloth; really, any plastic tablecloth would work. Other options: freezer paper; florist's foil (as olong as you put the cake on cake boards so the cake does not touch the foil); fondant are just a few choices.

I use wrapping paper that coordinates and cover that with food-safe cello and then trim the board with a nice ribbon. 

Not sure if I know what food safe cello is? Is there a specific brand for it, or am I just not thinking straight anymore??

I just buy it at Michaels - it is with the basket wrapping items and says right on the package that it's food safe. However, I still put my cake onto a cakeboard first for extra protection. 

Thanks guys, I found a $2 tablecloth with a fabric backing at Walmart and works great!!

The spandex table covers would do the trick. It stretches on the table and covers the plywood and give the table a wonderful look.