Purchased a house in Colorado, needs lots of work. One basic problem is the 2nd floor deck which serves as a roof to a screened porch. It currently is covered with tarps as the exposed surface is painted particle board. (Everyone knows this is NOT the product to use on an exposed surface.) Any workable alternatives? Heard of a product called du-b-lo or dri-b-lo? Was a suggestion from someone but find no info on this. Thanks for any assistance.