How to Repair Water Stains
- Use a bleach/water solution to blot and wipe the stain away.
- After the area dries, if it is still stable, you can directly paint over the area.
- Remove the damaged part of the ceiling/ceiling tiles, drywall, and replace them with new, clean sections.
Mix a solution of one part bleach and three parts warm water, or use a premixed cleaner, and wipe down the stain. Then wipe the solution off with a wet rag, and dry the area with a towel. Wait a few hours to let the ceiling completely dry. Much like when you're painting a wall, you'll want to use a primer first.