360 g/m^2 is about 10.6 oz/yd^2. You did well with it. Nice work.
I agree that the more probable problem is contamination /sizing.

"Martin Schöön" wrote in message
...
"Jim Conlin" writes:

Glass heavier than 6-8 oz. will not go clear in epoxy. If you need a
heavier layup for structural reasons, a clear finish is out.
Glass cloth has a 'sizing' treatment that is sometimes specific to a
particular type of resin. Ask your vendor if that glass is intended for
use
with epoxy.

I don't know what 6-8 oz is in real units but here is a 21 year
old boat that has some 360 g/sqm of UDWR glass in epoxy on each
side of the Western Red Cedar. Looks OK to me but your mileage
may vary.

http://hem.bredband.net/b262106/Boat/juguete.html
and
http://hem.bredband.net/b262106/Boat/build.html

I think the OP's problem is contaminated glass.

--
Martin Schöön "Problems worthy of attack
show their worth by hitting back."
Piet Hein