2 Gallons of primer is a good start for the whole boat.
just over a quart and a half for the hull finish.
just under a gallon for the topsides of finish.
An average size car takes 3qts sprayable per coat so a 31 Bertram hull should be at least 2-3qts per side per coat. Two coats should be fine if medium coats are sprayed. I would buy enough to have 2-1/2gal after thinning for the total job. By the time you get to doing the topside you will know if you have enough to finish it. Having some left over is a good thing for spot blending scratches in the future. Just fill the can with argon before closing and tape the lid closed. Paint stored this way will last years. Troy
