Re: Stripping the floor and ceiling of a 100-year-old porch
If the floor looks entirely like that part in the photo, I'd just rent a floor sander and abrade the whole thing to 80 grit and paint. It's pretty far gone for gentler means.
I once dry-sc****d two porch ceilings totaling 1000 sq ft. I used a 1 1/2" sc****r, kept very sharp with a file, and made a specially shaped sc****r for the beads. There was 100 years worth of white paint on it and it was very alligatored and ready to shed off. It took about 3 days. An incredible upper body workout. It was an 11' ceiling so I was standing on staging at an optimal height to work. I had to wear a respirator, of course, and I was completely bathed in lead and sweat after every session. I think I filled two 50 gallon trash cans with paint chips on that job.
Chemical strippers on ceilings would be IMO even more loathsome a job than manual scraping. As one who has used a lot of peel-away, It is hell when it completely dries out. Not to mention that it stops working when dry. I would be concerned that under hot, dry, summer outdoor conditions it would dry out long before it had done much work. The soygel types might do a lot better. But either will require some kind or water-rinse.
Remove not the ancient landmark, which your fathers have set.