Pilot Supplies and Aircraft Parts from Aircraft Spruce
This is really good resin. Very little outgassing (smell) Great for bagging.
MGS EPOXY RESINS from Aircraft Spruce
Fiberglass / Kevlar / Carbon fiber is pretty good on ebay.
Carbon tow if you really need to strong spot.
Super light panel can be made with a layup like this...
1 layer 1 oz glass cloth
1 layer 5 oz carbon single weave
1 layer balsa wood. 1/8" thk
You can do thick panels with end-grain balsa 1/2"+ thickness (super strong)
1 layer 5 oz carbon single weave
1 layer 1 oz glass
.015 thick mylar to lay and squeegy each side and a vacuum back to pull it all together.
Look up vacuum bagging videos.
Practice on some small pieces first. Use the 60 minute hardener to give yourself a little more time.
It's going to be about 24 hours in vacuum so if you have a loud pump it may be an issue for other people in the house. My wife used to hate my little diaphram vacuum pump running all night. She'd bitch and moan for a couple of days about it. Don't try it if the temp is going to be below 75F