On Thu, 10 May 2007 16:13:01 -0400, "Ernest Scribbler"
wrote:

From what I've seen, it's entirely plausible that some blistering might
develop during a single season after not being there at all in the
pre-season survey.

Absolutely. It's not uncommon in my experience for somy minor
blisters to form over the winter and then disappear again when the
boat goes in the water. Even if they don't disappear this is hardly a
federal case.