What I have noticed , that when you put planks together, like on a sheet and them install on ship or boat you are building , the planks seem to " Bow " alot. I have made a DIP pipe out of a piece of 1/2'' steel pipe and get 2 caps for each end. Put 1 cap on the pipe and seal the cap with teflon tape. Fill the pipe with whatever stain , paint, or sealer you are going to use. Then Dip each plank into pipe and then I hold one end of plank , and pull the plank thru a shop rag to squeeze out excess liquid. Lay planks to air dry , they come out pretty straight. Now you are covering all the wood , has a tendency not to cup or " Bow ". Then I mount each piece after dry fitting of each piece. I am currently building the " Robert E Lee " steamboat from actual blueprints which I purchased thru the Steamboat Museum.
After your finished with your pipe solution , put the second cap on and use in future. Remember when Building , BE CREATIVE , Don't be in a hurry .......Regards