[flightofone]

The honeycomb itself isn't very strong, but is combined as a core in a sandwich with FRPs like fiberglass, kevlar or carbon fiber cloth outer layers. That produces about the strongest, lightest construction possible. There are a number of practical problems with actually making the panels, including epoxy resin toxicity, cutting it (there are special shears), avoiding having the core material soak up the resin (pre-preg with approriate films works for this), avoiding voids (vacuum bagging), and heat curing.
If you are just thinking about it now, you may want to buy pre-fabricated panel material or use aluminum, as there is a steep learning curve to the fabrication. Nomex is another popular core material - slightly less expensive than Kevlar honeycomb. It makes a great off-season activity to build up the expertise.