This was a fairly common occurance on some boats from the mid-70s
through mid 80s. Its not serious and can be easily 'patched'.
What happened is that the lay-up crew sprayed-on the gelcoat to the
mold, then went home allowing the gelcoat to fully cure, and gather
dirt, dust, etc. When they came back in the morining they simply
started where they left off with matting, roving, etc.

The lay-up of polyester needs to be a continuous process so that no one
section of the laminate cures before the next layer is applied. Most
of the 'high-end' builders now do the layup in one single process with
no interruptions until fully finished.

Was your V32 built by Tayana? My Tayana 37 has the same 'problem' ...
I simply 'opened' all the above the waterline teeny blisters and filled
with correctly matched gelcoat, etc. Inside those 'blisters' was a
talc-like substance .... probably dust from the floor sweepers after
the layup crew went home for the evening.




In article .com,
PeterS wrote:

Hi,

I viewed a 1983 Vancouver 32 recently that had osmotic blistering
covering about 4 feet of the topsides below the teak cap rail on both
port & starboard aft quarters. There are no blisters or signs of
osmosis below the waterline.

I'm concerned as to what might be causing these blisters, there are no
visual clues. The deck joins the hull underneath the cap rail and
maybe moisture has entered here?

Has anyone seen anything similar before?

Thanks,
Peter