Strip the bulk of the paint that comes off reasonably easy then sand what it doesn't touch would be my method.
Nasty stuff in old paint dust. Good extraction is worth investing in if you do sand through it.
That’s good to know just been breathing the stuff in all afternoon!
Although I don’t think the paint was particularly old




. A guy that does a bit of grit blasting for me does a lot of oak framed barns but they are at the construction stage and not lived in, cant see how you could contain the mess using this method unless one of the recirc jobbies could do it.