Thanks for the information Lemat.
I'm trying to understand how the veneer can take on water if it's 1/40 of an inch thick (<1mm) and is coated top and bottom with epoxy ( I used slow cure to try and let it saturate more completely). I have had issues with water intrusion around fins plugs, but not on a timber board.
I put a strip of 2.3 oz glass over the stringer on the deck because that is where the leaves of the bookmatched veneer are. I was worried about that cracking. THe 2.3 oz is really fine but it came out kind of bumpy. I'm wither going to have to put a heavy hot coat on, or sand intto the weave alot.
Wood fiber is hollow, epoxy don't go in otherwise it weight a lot. So if fiber is open, water go in. Need special care for a real watertight layers in and out. Near all used starboard wood i see, 0,6mm pine with thin to no glass over, have wood water intrusion.
Slow cure is for sure a good idea with wood.
I like your shape, really clean.