There are a lot of ways to fooling the blister liquid into leaving. The easiest way to accomplish this is to raise the laminate temperature above the dewpoint and/or ambient temperature. And it only takes a couple of degrees of differential to make it work.
Tenting a 30'' boat is a pain but can be done. Next is the heat source. Direct fire heaters are not the answer, as they produce large amounts of water vapor, thus raising the dew point. Electric or indirect fired heaters (burning chamber vented outside the enclosure). Also, close up the
hatches and throw in about 1500 Watts of electric heat (thermostatically controlled to 95 D) and raise the cabin temperature. This will work for the hull, but won''t get to the keel.
Does the yard really have equipment to vacuum bag a 30'' er???
Much will depend on the condition of the laminate after the gelcoat is removed. Wet laminate surrounding the blister locations will become visually apparent and to the extent it has traveled will determine the amount of effort required to dry it out.
On other types of structures, I have even air conditioned the tent to wring the moisture out of the air (expensive).
But dry is good, and it is such a nasty process, you don''t want to do it again in this lifetime.
Good Luck this winter,
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