(priming and painting is always done on site by a painter) whitewashed shiplap:. are you ready to learn how to plank walls, and do it for cheap?. magnolia home paint (17). actually it\u0027s really two words: \u201cnickel gap\u201d so what\u0027s the difference, and why does it matter? well, technically shiplap is a type of board with a rabbet . time to prep the wall! remove all outlet covers and baseboards then, paint the wall with the same color you have chosen to paint the shiplap (major key). shiplap paneling makes a comeback acadian house kitchen bath. ship lap.