I built a failed experimental dory using Pink foam - 1" and 2", sheathed
with epoxy/glass. More than 15 years later, it's still deteriorating in the
yard - the epoxy/foam bond was never a problem. Very
expensive/time-consuming for trying out a lousy design. But it was light,
strong, and unsinkable!

As I recall, my brother built a pink foam kayak, maybe sheathed in
polyester/glass. I vaguely remember problems with the polyester bond in a
structural application.

I've used foam/epoxy in a number of applications, including a sponsons on my
daughter's kayak. Glue it on, as many layers thick as you like, and then
shape with a razor knife or electric sander. My guess is you'll be able to
find a good cheap primer or paint for it. Or just leave it "bright"!


And be careful with terminology - I'm not an expert, but there are a lot of
products out there, and most people use incorrect names for them.

Sal's Dad

"Brian D" wrote in message
...

The blue closed-cell polyethylene is great for under decks, but I wonder
how well it will glue to something. You might try Liquid Nails or similar
I suppose. OTOH, there's another foam which is a high density closed-cell
polystyrene ('styrofoam') that's coated with primer type coating ready for
painting. Builders use it for something. Can't remember the name, but it
struck me as something that could look nice under a gunnel since it's
above the waterline. You can epoxy and paint right over it. Note that
the blue foam does distort a little when it stays wet for weeks or months
at a time. I'm going to use it under the decks, but haven't made a final
decision on other flotation in the boat. I need to calculate how much I
need and figure out where to hide it.

Brian D