I have recently acquired a 1978 Newport 27. I and am a little uneasy about the keel bolts being glassed over. Given the age of the boat, it would be nice to inspect the bolts. I really don't have much faith in the idea that they were "permanently sealed against corrosion". Has anyone who owns a 27, or another model with similar keel setup ever removed the glass to inspect the bolts? If so, would you comment on the procedure and your experience? Thanks!