Ok Jerry I took my old trusty die grinder and attacked the spot , as best as I could tell after the dust settled , thinking its gel coat . So with that information I'll leave it be for now . I'm living in the wet land of Vancouver B.C. . Hoping to have this boat cleaned and fixed up to my satisfaction for sailing by January KLaas jerry montgomery jerry at jerrymontgomery.org Tue Oct 18 19:59:11 MDT 2011 a.. Previous message: M_Boats: Re Cracks in locker b.. Next message: M_Boats: M17 video and pictures c.. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] -------------------------------------------------------------------------------- A 1/4" crack is DEEP. Could it be that the gelcoat that was used to paint out the interior of the boat pooled in that area to a depth of 1/4"? Get some light and dig around and you should be able to tell if it;s gel coat or glass. There shouldn't be any filler material there; we simply prewet the plywood and bonded one side, and when that cured we bonded the other side. Bonds should be a bit wetter than a laminate but definately not wet enought to be swimming in resin, which becomes brittle and dead weight. I don't suppose you're anywhere near Sacramento? jerry