If you are going to paint by hand, pick up a copy of Internationals paint handbook. It's free at your local chandlers. There is a system in it that describes how to paint with a brush. You need two people though! One to paint and the other brushes out the streaks. They also have a paint leveling additive which is prety good. I have seen boats that have been painted this way and they look prety damn good!!!
Also IMHO, single pack 'toplac' by international is as good as any two pack PU and a fraction of the cost.
Just remembered, it's all online, www.yachtpaint.com
, I Think!