The process of air movement over the area will actually dry out your hull more than heating it. If you can, get some industrial fans and keep the air flowing over the hull to dry it out quicker,
Brett
Actually I believe this is not consistent with almost all experts I have read and my own personal complete bottom job.
Gel coat traps moisture very well and all the heat and air without a vacuum is a waste of time unless you have years and climate to air dry.
If all you are talking is quarter sized blisters say 1/4 inch deep...you shouldn't need anything but a few days, washing and maybe a ffew acetone wipes.
Places that have peeled hundreds of boats will tell you how hulls that have not have the gel removed, are almost impossible to dry economically due to the time to dry.
Even many of these highly experienced people in the process admit that grinding to dry laminate is the fastest and most complete way to dry a hull...unfortunately what is left of the hull is a bitch to fair...and I can personally account for this. Another costly item to an already huge project.
Sure there are lots of opinions...but after extensive research on my part...I found that many of the most experienced in finding and fixing these problems all agree...and completely disagree with about 99% of what you read from the average "boat expert".
They do also agree that once confident the blisters are not linked to severe hydrolysis, sure, air and wipe dry and fill'em up and go boating.
But for all those contemplating bigger issues than a few blisters....ignore most of what you read, search out those that almost specialize in this work or at least have numerous peel jobs under their belt and read even further.
Read up on hydrolysis in the underground composite pipe and storage tank industry. Scour the net for top tier experts that all tend to agree rather than the "don't worry about it crowd"....again this is not to scare anyone, just point them in the direction I believe will give them the knowledge to make the best decision for them.
I had to go off in one direction...hopefully most won't.