Painting
Ah! I thought Fairey might prove the exception to the planking rule. Well, it'll look nice, that's for sure. Paint. I always use enamel and my local auto paint shop will make me 1/4 litre tins up, of HMG, which lasts a long time from a small spray gun. Failing that, Rustoleum do some lovely rattle cans in a range of colours that spray very well and are only just over a fiver a tin. One tin would do you if you're careful. I've just given my Darby One Design its second coat of blue after a rub down and I'm happy with that. Dries very quickly, but is a nice gloss. it is a bit thin, so be very careful how you spray. Better to do two coats than one thick one. But really, if you can get it, HMG is the best bar none. Worth hunting for. Paint, alas, just ain't cheap anymore. Would that we could get tins of Valspar or Japlac, eh? The proper original stuff. Plastikote was a good paint when it was an enamel, now it's acrylic water based muck. No coverage and reacts with itself, let alone owt else.
I would be inclined, btw, to do that curved deck in veneer, so all your mistakes will be made before it goes on the boat. in which case, once the planks are made and fit bang on, go up the edges with a black marker pen. it will look like caulking when all is done.
Good luck,
Martin