If you laminate veneer/wood you need some glue/epoxy/laminating epoxy in between them, and if you add light fiberglass between there also - that will not make much difference in weight because you already need the glue right? It would however add quite a bit of strength, the epoxy is what represents most of the weight anyway.
I would do this with vacuum down to a 8mm glass plate or a straight shelf plate (inside the bag) if it is to be material plates, and I would have the light fiberglass on both surfaces - remember light and thin fiberglass becomes more or less invisible when it is saturated, all layers @ 45*/45* so you at the same time add the missing directional fibers in the 0/90* veneer... makes extremely straight and flat material plates.
Adding fiberglass require a "dry up" with paper towels pressed to it to remove excess epoxy (if you use laminating epoxy anyway) because the fiberglass cloth really sucks up a lot of epoxy and it makes puddles of epoxy under it - it is very important not to have any more epoxy than necessary because this will build up unnecessary weight very quickly indeed.
About stiffness one layer of fiberglass will not make much change, to get the stiffness potential from fiberglass you need two layers with some distance between them in a sandwich structure. An example would be to use one layer of 1/64" plywood on each side of a 1/8" balsa sheet, that would give the same effect - very stiff and strong compared to its weight.
I guess you could do it without vacuum, it is just an extremely simple and easy way to compress something together with an almost unimaginable perpendicular force - without taking up any space or represent any weight load on your work bench...
Fiberglass is a serious tool killer, but in thin layers in combination with wood it's alright. At an 1/16 fiberglass sheet a standard drill bit will last a couple of holes before it must be sharpened, a standard contour saw blade will last perhaps a couple of inches before the teeth are gone, cobalt/carbon steel drill bits will hold, a carbide (tungsten) drill/mill bit will last.
Very nice boat! Cheers
Last edited by ibuild; 02-16-2017 at 03:23 PM.