I plan on using a technique referred to as poor mans fiberglass to create the shell over shaped and bonded foam shell to create a bonded weather tight shell to direct the flow of air over the bed of my truck. doing this should prevent de-lamination (cavitation) of the air flow which will reduce the drag force on the back of my truck.
Poor mans fiberglassing is essentially impregnating cloth with paint to make it rigid and capable of withstanding the elements. when used with a foam shell it is recommended you use an adhesive to bond the canvas too the foam on the first layer and apply paint to subsequent layers to ensure the cloth adheres. I plan on using the roll on bedliner because it has proven to be Durable in the past.