> I am an experienced wood worker and have just recently started the strip
> building of kayaks. Have you tried using Elmers carpenters glue. Cut the
> scarfs so they will fit tightly together (no appreciable gaps), apply
> elmers carpenters glue and clamp the joint until dry. The glue is
> remarkably strong in normal woodworking (stronger than the woods glued)
> and is workable once dry. Since the joint will be sealed with epoxy
> anyway, there is no danger of it getting wet. Just a thought. Good Luck.

> Brian Barnett

Seriously, you're asking for big time trouble by scarfing with water-soluble adhesive. Epoxy is the ONLY safe way to go here.