...for the skim coat? Would it be lime putty plaster, or gypsum plaster (such as plaster of Paris)?
If lime putty, can I use the bag of slaked lime that's been in my garage for a year or two (but not more than 2), or will it be too carbonated by now? I *really* doubt that I can find quicklime.
My inclination is to use a setting-type joint compound, like Durabond 45.
Thanks, Bob