[Public-List] Barrier Coat

[Michael via Public-List]

Yes. It's hard to say whether the treatment does any good, blister wise. 
You'd have to leave one half the hull uncoated as control, but no 
blisters on Checkmate since coating. Then again, there wasn't much of a 
problem before.
It's a two part epoxy, though, I figure it must be protection from 
something.
To really see if there are any blisters, I use a soft pad grinder to 
give the old bottom paint a once over. Even small blisters show up readily.
My boatyard here is tightening up controlling bottom paint dust. They 
are requiring a vacuum arrangement and drop cloth screening now. I don't 
know how a blasting operation can be contained without putting the 
entire boat into a paint booth. Costs are really going up, which can 
justify the barrier coat application since you are going down to gel coat.

MichaelGrosh
#220