There is little curve to the hull above the bilge curve, so flat edged strips can butt and form a tight joint that I can see is perfect. I don't use bead and cove on my kayak decks. Again there is little curve to follow and it is eaier to see if the joint between strips is tight. And, it is eaier to play with variable strip widths for deck stripes and patterns. Router Set Up Use two routers, if possible, to mill cove and bead on the edges of one strip at the same time.
Few cutters remove less material than cove and bead router bits.
Use hardwood blocking screwed onto the routers anywhere you can drive a screw through. On one of my routers I removed the handle screws and used them to mount wood posts. On another router I blocked up to the base and screwed down through holes in the base plate. If you look at my drawing above you will see the objective is to set up the two routers so their bases are up, and level with each other. Set the depth of cut by using the adjustable fences that come with most routers.