Todd wrote:
On Jan 4, 6:55 pm, "My news" wrote:
Any advise or comment if I will use polyester and fiber glass on top of
cured and sanded epoxy on stich and glue? My plan is to prime the entire
hull with epoxy for a good bind before the application of
fiberglass/polyester skin.

I want to introduce this idea to the poor fishermen in the Philippines for
economic reason.

The epoxy will be softened by the polyester and MEK. It will be a big
mess.

The *only* way I have ever heard of to get a satisfactory bond with
standard polyester resin over normal epoxies is wait several months for
the epoxy to totally cure, abrade the **** out of it and apply a barrier
and bonding coat of G4 Pond Sealer then lay up the polyester laminate
while the G4 is still tacky. Ideally the area of epoxy to be overcoated
should be kept to a minimum as G4 works very well on wood and other
porous substrates.

Its doubtful whether full sheathing on a working boat will, in the long
term, be maintained well enough to prevent water penetration and
accelerated rot.

If the intention is to prevent worm damage, it may be a reasonable
solution, but the initial expense is likely to be high enough that only
rich fishermen can afford it, even though they will save money over the
life of the vessel. I don't think encouraging the use of large
quantities of expensive resins is going to do much for a sustainable
fishing industry in poor communities. Expensive boats with large loans
outstanding on them *will* lead to overfishing as the boat owners do
what it takes to reduce their debt. I fear that this may well seriously
worsen the circumstances of poor fishermen.

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
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