automated line will be designed to do this as the board travels through a spray booth once a base has been applied the wood substrate should be inspected for blisters that may have formed piles or wales with blisters should be discarded or reprocessed otherwise the next step of building mil thickness is taken in order to apply the full mil thickness one should allow the capacity of the plural component sprayer to operate at full capacity to bring the mil thickness of the coating up to specification the mil thickness should be allowed to cool for approximately 45 seconds before handling the above description is the initial 34 virgin 34 treating process in a nutshell however it should also be understood that a 34 field patch kit 34 is also contemplated under the present invention to allow contractors to patch up cuts and holes that they make to the wood substrate the patch kit essentially allows the contractors to 34 re seal 34 cuts that they 39 ve made one chief benefit of the spray process is that the manufacturer is not restricted to the dimension of board that he can coat any size board can be coated since the coating is not an extruded or molded part in one prior art configuration shown in u s pat no 5 360 295 a specific size plastic sleeve is extruded and must be used on a specific sized counterpart board the other advantages relate to the obvious advantage of including plastic as a shield to undesirable animals or weather conditions this invention has been described in specific detail with reference to the disclosed embodiments it will be understood that many.