: Over the course of the winter with the boat hanging in the garage,
: "the bubble" has now become a string of bubbles about
: 8 inches long and 2 inches high. It has edged up the hull
: underneath the seam strip (if that's what you call it) and
: perilously close to the deck. Something has to be done fast, but
: I won't be able to get to it for a couple weeks.

a simple solution is to pin prick a hole at each end of a bubble OR at each end of a connected string of bubbles and jam the syringe needle ONto the pinprick at one (say lower) end and force the epoxy into the delam. Setup so input is low and output is high. The idea is not to make the pinprick hole as big as the syringe needle so that it sticks into the delam (you don't put the needle in, but on) - as no pressure can be built up plus a larger hole may bruise the glass a little and become more visible. To keep the intial hole small, I twirl a pinvised needle. With fairly simple planning (inject low,etc) all the air will evacuate as the resin rises or travels along.

It is a wondrous thing to see a 12" string of unsightly connected bubbles become clear - as the entrapped resin is forced along as you push down on the syringe. I seem to remember at least a few howls and brewskis being downed in satisfaction immediately afterwards. It might be a little messy (say 20% doesn't get in - so have a rag handy to wipe up) but so little is required anyway. Hopefully this is similar to your situation, so good luck.