In an unoccupied space, the "wet and scrape" method is probably the easiest. I figure by the time you do all the masking and set-up to "wet and scrape", using a scraper and power sander with a good vac system is pretty much a "wash". I use the vac system for all repairs to reduce dust anyway. When I replied, I was answering more along the lines of a painted surface, but personally I would use the same method either way. I know a lot of people use the "wet and scrape" with great success. And yes, the joints will need at least one skim coat....
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