In terms of removing the papery stuff, I think my plan is to use crowbars and stuff to lift all the rest first—letting the papery stuff protect the wood—and then use scrapers to remove that last bit. The paper isn't bonded to the varnish, it's just stuck to it, and I don't have glue patterns to deal with, so it's a fair bit of scraping but I don't think it'll be too bad.