Our problem is similiar but not exactly the same. Our ceiling had a 3' square crack and drop and my scraped and now we have the wood lathe showing. he would like to repair- What should we use and how should we prep for this and how much experiance does he need!! can we do this or should we hire someone to do it. Our house is a 1934 2 story home in St Pete, Fl- were old homes are not very common please email us back quickly- so we can get this accomplished soon!!