Hello Pete,
The only reason I can think of that would prevent me from using CPES is the solvents during application - whew, respirator and full immersion gear here as I'm sure you are well aware!
I haven't tried it as a seal coat but am tempted now that you've defined all of the positive points to do so. In fact, I will use it on the next kayak as a sealer and keep you posted as to the results. This kayak is going to incorporate some teak - primarily as accent wood. As you know teak is an oily wood that doesn't take too kindly to adhesives without some extra preparation - in this case wiping down with MEK to get rid of surface oils followed by an immediate application of CPES to keep the deeper oils where they belong - deeper and away from glue joints and fiberglass.
Joe

: What is your opinion of using CPES as a seal coat on a stripper? Ever try it?
: Can you think of a reason not to?

: One of the East Coast pros posted a message a while ago saying that rot was
: the big risk with this type of construction. Structurally there isn't much
: that can go wrong that can't be fixed with duct tape long enough to get
: you home, but dings in the glass can allow water penetration into the
: strips. Then it wicks through fibers and along joints and causes cancer
: over time. For instance, I didn't pay nearly as much attention to the
: inside of my Guillemot as to the outside, back it didn't seem to matter.
: But with all the wet entries and roll practice, there are a couple spots
: visible on the outside where cancer has started from the inside. I plan to
: run some CPES in those areas, slosh it around and hope for the best.

: CPES looks like a good way to head all that off, at a reasonable investment
: in time and materials. And not much of a weight penalty, either.

: Congrats on getting the King up and running. Keep a set of plans warm for me,
: OK?