I'm looking for a good core material to use for the deck of my 19' Renken. I ran across a product called nida-core. It's a honeycomb material compatible with most resins, at least that's what their web site says.<br />Does anyone here have experience using this material?<br />My biggest concern is strength once it's glassed into place. How many layers of what type of fiberglass cloth would be necessary to give it the necessary strength?