It's been a while since I soaked the brittle seats with glycerin just to let you guys know so far so good. I know nothing is going to make the seats new again but they are holding up if somebody wanted to you could probably tear them apart with your hands. I put on many coats and it soaked in now it's not soaking in any more so I am done. It doesn't seem to come off on cloths. At least not on my old cloths!
Looking good! Nothing lost in trying and nothing gained by not except getting a few more years out of what looks to be not bad seats.
Paul, you are fortunate to own that car. Keep up the good work, and never stop learning!