OK - so we continue here.
Jef's last post in the "FP Mahe 36" thread was:
Originally Posted by Jef & Marin, Netherlands
I do not know whether the Fountaine Pajots have osmosis
problems. Fibreglass polyester (or vinylesters) can absorb humidity, how severe this is depends on materials and process but also on water temperature, and also on exposure: how long does your ship go out of the water eg in winter.
Preventing of a potential problem can of course be done by applying a number of anti-osmosis epoxy layers. Maybe you could negotiate with Fountaine Pajot that your ship is initially delivered to you out of the water; then you apply a number of layers of epoxy and anti-fouling
yourself; then Fountaine Pajot launches the ship and mounts the rigging
and does the regular in-water checks. You would have to live a number of days in La Rochelle, in a hotel
or camper or in your ship.
I applied epoxy and coppercoat antifouling after removing the standard soft antifouling from Fountaine Pajot. Removal
was a terrible job.
The above is what I would try to do.
Thanks again for your input, Jef.
In my offer, FP states that my boat is to be delivered with "Antifouling w/Epoxy primer". Are you saying they supply a bad epoxy primer, or have FP now changed from normal primer to epoxyprimer?
I have never heard of actual osmosis on a 4 year old boat, neither on a 10 year old. Developing osmosis in a GRP hull
is a slow process that normally takes decades, the speed of development however is influenced by several factors.
the general idea is that osmosis may be found in +20 year old boats, and the major factor is bad workmanship in building the hull
. You would rarely find osmosis on our Scandinavian built boats who are built by professionals, even 30-40 years old. At least thats what we like to think.
But I have no idea how this is in your warm waters.
I can't imagine that the blisters
found on some Mahe's really is osmosis. I'd rather think it has something to do with the way of production - that they are "produced" with blisters
It's normally easy to determine: Real osmosis blisters contain an acid-like, smelly fluid. If they are dry or contain pure water, it's not osmosis, but some other kind of fault or damage.