About to paint the hull of my Night Heron.  I have read around in circles in many forums to use the roller then tip with a dry brush horizontally.  I did it this way on varnishing the deck.  So it seems to do the same for the hull.  Though on the website of interlux they say to tip virtically.  This makes sense because gravity will pull any extra pain downward following the micro (small) channels made by the brush.  If tipping horizontal the extra paint, while drying will fall as per gravity perpindicular to the brush strokes.  Like a levy (wall). The paint can build as it tries to go over the hump trying to make its way down the virtical sides (chine) of the kayak.  Now  the bottom of the hulll I would see that running bow to stern would be correct.  No gravity really at play there.  Any thoughts out there?  Or kayaks just small enough not to go this way but for larger (fullsize) boats tip vertically as in the directions from Interlux.  Thanks in advance.