I first stripped the wallpaper from my bedroom walls using a steam stripper and scraper. This revealed a lurid pink paint on the walls and a peculiar purple ceiling paint which came off in sheets like vinyl. The ceiling is now stripped revealing a blue paint which I intend to leave on and give a light sanding. The pink wall paint comes off like Mozarella cheese after the steamer has been held over it for a little while. It's painfully slow progress and I don't know whether to continue stripping it. I have considered buying a hot air gun to use instead of the steamer. Any advice would be greatly appreciated.
The two standard ways to strip paint is heat or chemicals. Both are labor intensive and messy, and chemicals are caustic. I assume you are planning to strip the paint only because you are left with an uneven surface after it was already partly removed? Otherwise, just paint over it right?
It might be easier to lightly scrape to remove loose paint, then skim coat the whole surface with finishing plaster. Some light sanding afterwards, and you're ready for prime coat.
One approach that avoids the labor of scraping and sanding, as well as eliminating the lead issue, is the application of thin wallboard screwed directly over the existing ceiling and walls. While taping and filling joints and screw holes requires some effort, it is much less, and requires less skill, than skim coating.