Here's a puzzle for you. <br /><br />I recently bought a little Bayliner Jazz jet boat. It has a foam filled hull like a Boston Whaler, with foam formed in place between an inner and outer fiberglass hull. The gelcoat was worn off the bottom of the keel near the bow in a patch about 2" by 6". It had not been in the water for over a year when I bought it and had never been in saltwater. The worn area was dry and the wear had not gotten into the glass, just barely past the gelcoat. <br /><br />I had the boat out to the lake about four times for a total of about 8 hours before I got around to patching the gelcoat. When I went to patch it, I noticed this brown, sticky, slightly sweet smelling, viscous liquid weeping from the area where the gellcoat was worn off. Not enough to drip, just enough to form a dime size glob on the bottom. I wiped it down good, cleaned it with brake cleaner, and covered the worn spot with MarineTex. <br /><br />Problem is, this molasses like stuff continues to weep out through the MarineTex. Anybody know what this might be? If the foam between the hulls gets wet, does it degrade into something like this? I hate to cut into the bottom to investigate if it is really not hurting anything. I'm secretly hoping it will stop over the winter while the boat is out of the water. The boat does not seem overly heavy like it would if a lot of the foam was water soaked. Any adivce will be appreciated.