is osmosis possible in paint?

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Posted by Michael Sammut on June 08, 2000 at 04:32:13:

I have just hauled my boat out and discovered
a number of small blisters in the paint over the
gelcoat but none in the gelcoat itself. The gelcoat
has a layer of primer over it, then about three
layers of Interspeed 2000 (hard) and it had 4 layers
of CSC Micron (ablative) which eventually wore away.
The liquid in the blisters does smell vinegary.

The boat is a 1982 Maxi 108 and there don't
seem to be any previous osmosis repairs to it.

Since the gelcoat isn't affected, is this osmosis,
and do I need to consider treatment before anything
else? Also I am in Malta, and in the event I need
HYAB attention which is the closest place to turn to?

Many thanks for your attention

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