: The recommended procedure consists of cutting around and removing
: the face veneer from the bubble, sanding of the original
: adhesive and gluing the face veneer back using epoxy. The
: problem I see with that method is, if the ply delaminated in the
: first place it either isn't marine/outdoor quality or it's
: substandard; either way it's going to do it again and eventually
: the repaired areas will be the only parts still stuck together.

: For small bubbles I use a hyperdermic syringe to inject water-based
: glue like Titebond III into the bubble. The needles and syringes
: are available from farmer's and vetinarian supply stores; the
: wee ones for self-administered drugs are mostly too small. I add
: about 10% water to the glue to make it easier to inject, and
: once it's in there I poke the bubble a few times to spread the
: glue then weight it down until it sets.

: Larger bubbles can be slit with a knife and undiluted glue squirted
: in; use foam under the weights to spread the pressure uniformly.

: - however there comes a point when one has to accept that the
: plywood was not good enough in the first place . . .

Perhaps I was unclear. The fiberglass is delaminating from the wood, not the wood from itself. The wood is good. Its just bubbled forming under the fiberglass/epoxy, between it and the wood. I dont see this as being a wood problem, though I could be wrong. Seems more like an adhesion problem. The boat is at least 10 years old, not built by me.

Someone suggested that it needs to be cleaned out and maybe sanded under the bubble, to remove the epoxy that has failed.