Here’s an interesting account of building a surfboard from scratch from Daniel Crockett –

“Creating a custom surfboard is a specialised and personal practice. The board, from inception to completion, is also an individual. It reflects the methods adopted by the shaper, and the intricacies of his craft. This story charts the construction of a WidowMaker from blank to glassed and ridden article, but first, a bit of history…”Link.