If Liquid Nails has bonded to your drywall and you want to remove it, apply heat or a solvent before scraping. This process will make removal easier and reduce damage to the drywall surface. Use a heat gun to soften the Liquid Nails or apply mineral spirits, petroleum jelly, or a similar compound to the dried adhesive. Once the Liquid Nail Glue has softened, scrape it off your drywall. If there is any damage after removal, patch your drywall with joint compound before painting.