ORIGINAL: tony-howard
A couple of years ago I had occassion to cut into a often flown flying boat built in the early 70's that used Sorghum to attach 1/16" balsa sheeting to its foam core. The blasa would not separate from the foam anywhere, instead tearing out chunks of foam wherever the sheeting had to be removed. As near as I could tell, the bond was still perfect after all those years.
I have some wonderful memories of building and flying those flying boats years ago!