Lightweight or ultra lightweight? Honeycomb!

I've seen a thread about an ultralight build and have seen ideas for wood, laminated wood, aluminum, and all combinations of the same but I don't think I've seen anyone mention honeycomb.
You can build airplanes, high perfofmance boats, etc, from this and I wondered if anyone has tried it?
Thomas.net.com has a big section of companies manufacturing honeycomb products.
Wadya think? Les
You can build airplanes, high perfofmance boats, etc, from this and I wondered if anyone has tried it?
Thomas.net.com has a big section of companies manufacturing honeycomb products.
Wadya think? Les