I have a very large base (16x20) that i need to cover but I didn't want to use fondant. Any suggestions on what I can use and how I can keep it from getting the grease stain from the buttercream and still be food safe?
I usually use freezer wrap (shiny side up) or the florist foil that's plastic coated.
Once in a while I use decorated vinyl with an adhesive back. You should be able to find some at your local fabric store. It's almost like tablecloth fabric.
I use a patterned/themed/colored/textured scrap book paper that I first apply Glad Press and Seal to, then cut to fit my board.
I know your board is larger than the avg sheet of scrap book paper, but they do sell paper in large rolls that can be cut!
I usually cover my cake boards with gift wrap and then go over with food safe laminate or contact paper. It's a fairly inexpensive way of covering the board. And a large roll of gift wrap goes a long way. Hope this helps!