I've been looking into plaster lately. It's not all that easy to find plaster, for sale I mean. But I want to learn how to do it right. There is a store for plaster-specific supplies about an hour and a half from here. I'm thinking of visiting soon. For instance, there's a nifty material called "plaster bond" that you can put into cracks before refinishing. The carriage house has lots of cracked plaster (the big house, not so much, for some reason). I'm eager to give this stuff a try.