that foam turns hard as a rock. there will be no problem using it to seal off the area between the baffle and the rear deck as there will be almost zero pressurization of the trunk area.you gonna glass around that baffle? or maybe i missed it, but it looks like you used foam to bridge the gap?if i missed something let me know, but if there is just foam in that gap, your going to have a problem.
good looking work...may i ask if it was a shop you took it to that used the cut off wheel? I'm liking the idea and the progress....
GL