I've never used permacone, how ever I use the 120, solid plastic frames from Mann-Lake
I agree about airing out the frames, however, I only air them out in the open, for about 4/5 days.
Have a small hot pot, and a 4 in. foam roller, 1 swipe down the center of each side of a frame {medium 10/15 seconds per frame} and done !
I've had excelent results.
Just a hobby
Bee-Bop