I've been playing about with the pontoon design for a week or so and thought to myself , hmm. I have a commercial grade hot glue gun ($60) and a lot of glue sticks. Mind you i also have about 40 kilos of resin in drums and all the proper stuff as well.
So we went to work making a test model roughly a third the size of the plans. Stitching as normal and then tacking with the hot glue then making the fillet with the hot glue once fully tacked.
A couple of things we found
1/ hot glue is extremely hot
2/ if you run a tool like you do when smoothing a fillet spreading the glue while still hot works well.
3/ And this is the one that surprised me.
When all the glue was in and we tried to pull it apart there was no way on earth we could break the glue away from the ply.
The ply cracked outside the edges of the glue, that stuff was solid as steel. Granted we weren't using a good quality ply but it worked rather well.
One we finished using the glue has had the seams from the outside filled with resin and flour as normal.
For something that wont be seen it would be ok, but it does not sand at all, gums up the sandpaper.
For taking in small blobs, smoothed then covered with normal fillet material it may work . Its fast , sets in about 2 minutes once applied.