a skeletal substrate associated with a composite over spray or over molded article , such as a stackable pallet . the skeletal substrate includes a three dimensional article , such as a durable corrugated paperboard or other material , with a load supporting and planar upper surface and a recess configured and pallet fork receiving underside . the substrate incorporates a repeating pattern of cylindrical , polygonal , wave like or other shapes , such as which are coated in built up fashion with a polymeric material in order to provide insulating of the substrate from the environment as well as to provide additional strength .