Coroflex? Here y'are.

http://foldingkayaks.org/build.html

May be a funny toy to trim out. Poor durability. Pool faring craft. Your choice, but if you definitely want to avoid epoxy you may finish plywood with paint. You may look for cheap exterior ply at construction suppliers'. Otherwise, I'd go with ply.

Best

Froggy

: Hi,

: I am thinking about building an open kayak or small canoe using Corex
: fluteboard - I am not sure if the brand is the same in your areas - it's
: the extruded polypropolene sheeting connected by ribs, often used for
: signs.

: I recall someone else trying this and I would like to check the stock sizes
: and joining techniques used, however I can't find the link.

: Does anyone know if stringers are needed to give stiffness or increase
: bonding area?

: The stock I am thinking of using is 5mm, Liquid nails construction adhesive
: and silicon sealant to fill exposed cores.

: Any help would be appreciated.