Paint doesn't adhere well when applied over chemical stripper so wash off as much as possible and neutralize what remains. To do this use steel wool or an abrasive green scrubbing pad dipped in an "after wash," which is a solvent recommended by the stripper manufacturer. You may also be able to use mineral spirits or water, depending on what the manufacturer of the stripper recommends.
Use a putty knife to spread joint compound on cracks and holes. Apply a thin coat of compound feathering the coat several inches beyond the outline of the repair area.
Let the compound dry overnight, and then apply a second coat feathering the compound several inches beyond the edge of the first coat.
When the second coat is dry, smooth the patch and feathered areas with 150 grit sandpaper in a drywall sanding pole and finishing sander. The ceiling is ready to prime and paint when the entire surface appears smooth.
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