Roger that Dave, I am aware that one has to sand and do surface prep and take breathing precautions.
I am not sure I will do a barrier coat for the following reasons. Please comment.
A barrier coat presumably seals
the hull. If the hull has captured moistured it needs quite a lot of time to dry out. So a barrier coat should be done after a long sit on the hard
AFTER the bottom has been stripped so that trapped moisture can "escape". If I haul my boat, remove bottom paint
and THEN add a barrier coat I will be defeating the purpose of the barrier coat IF I have moisture trapped. I assume I have a bit. But I have no blisters
at least not the last time I looked and that is 21 years. I think the gelcoat
is "working" fine.
Barrier coats are hard, and require a lot of sanding
and that stuff is nasty so I would rather not, if I don't have to. But that, of course assumes that the hull and gelcoat are in good condition.
What say you?