[quote=Dogboy]Sounds like you bought a fairly beat up old boat, are you sure it's worth sinking a lot of money/time into fixing it up? Certainly make sure there are no structural issues with the hulls (soft spots, large cracks).
Anyway, if there is a fiberglass patch over top of the paint, then you're going to have to grind off the patch as well. The patch wasn't done properly to begin with anyway, because you shouldn't patch over paint, you need to first grind down to clean fiberglass before doing a patch. The stuff on the bottom of the hull sounds like it could be truck bed liner. If it is, it will probably be harder than heck to get off the hulls. Again, it sounds like this boat has seen better days and may not be worth putting a lot of time into trying to make pretty. Just clean it up, fix any structural issues, and sail it the way it is.
Another thought on your pylon issue as well would be to remove the dolphin striker bar and the crossbar rivets and take off the crossbar that way (leaving the corner casting fixed to the pylon). Replacing a few rivets will be a lot less expensive than replacing an entire corner casting and there's a lot less risk of damaging something this way.
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