Hi David, I'm with Josh on this.
We had ours taken to the gelcoat last spring as well (Apparently the 1st
time ever on my boat..) it had the original old style tar looking barrier
coat stuff which had peeled off in multiple places.. The only sign of a
possible blister was one little pin-prick the size of an eraser head
despite the multiple bare spots..
My very experienced guy doing the bottom strongly advised against a new
barrier coat. He said: Your boat is still very dry but any moisture
present would be contained by the barrier coat / could possibly create new
problems you obviously don't have at this point. He said that he's tried
it / been pursuaded to do over the decades but finally concluded that
overall, unless it was applied on a brand new boat or one that had been
stored inside for several months, it was a bad idea..
Plus as Josh said, C&C was among the early adopters for blister resistant
gelcoat. Our boat used the Hydrex Isophtalic NPG which is close to a
modern vinylester it its ability to resist blisters / uv rays / oxidation.
You can see more details about the boat's construction here:
http://www.cncphotoalbum.com/reviews/review34-36.htm or google "Hydrex
Isophtalic NPG" for more details.
-Francois Rivard
1990 34+ "Take Five"
Lake Lanier, Georgia
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