Yeah, I am restoring an old house with plaster lath and it's impossible to remove the paint down to the plaster. I was scraping off as much paint as possible and then skimming with joint compound, but the moisture in the joint compound would lift the paint that didn't get scraped off. It was like using joint compound as paint remover. Now, I just peel off the old wallpaper and paint over everything with Gardz and it locks it all down. Then I can skim with joint compound and paint, no problems. It goes a long way too. I think the one 5 gal bucket will make it through the whole job, 2000 Sq tf house. Apply liberally and work it in thoroughly.