On Sun, 7 Mar 2010 09:07:59 -0800 (PST), Frogwatch
wrote:

Am looking for plywood less than 4 mm. Apparently, Okoume has no rot
resistance so I'd like something else. However, I cannot even find
Okoume less than 5/32" thick.
Any ideas?

You might want to take a look at a book called "Ultralight
Boatbuilding " by Thomas Hill.

http://www.amazon.com/Ultralight-Boa.../dp/0071567038

He has built a lot of small boats from Okoume and claims that it is
highly rot resistant. I've built a few things from it also and had no
problems. It is very strong for its weight and laminates well with
epoxy.