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Home / Cleaning Guides / House / Walls and Ceilings / How to Remove Chalk from Plaster

How to Remove Chalk from Plaster

Table of Contents:
  1. You Will Need
  2. Steps to Remove the Chalk
  3. Additional Tips and Advice

Kerri asked: How do I remove green chalk from wall plaster? I have tried Mr. Clean Magic Eraser and a mild soap solution with no success.

The following method safely removes chalk from finished plaster (although it’s always a good idea to spot test before you begin). If you’re trying to remove chalk from unfinished or unpainted plaster, see the information below in the additional tips and advice section.

You Will Need:

  • Trisodium phosphate (TSP)
  • Warm water
  • Bucket
  • Clean cloths/rags

Steps to Remove the Chalk:

  1. Begin by mixing 1 tablespoon of TSP with 1 gallon of warm water in the bucket.
  2. Mix well.
  3. Moisten a cloth completely with the solution. Wear protective gloves if you’d like.
  4. Use the cloth to apply the solution to the wall, scrubbing gently as needed.
  5. Repeat until the wall is clean.
  6. Rinse away any TSP residue with a second cloth dampened with clean water.
  7. Dry the area with a soft cloth and allow it to air dry completely.

Additional Tips and Advice

  • If the wall is unpainted or unfinished plaster, do not apply water or other liquids. Instead, use a toothbrush (for textured walls) or a piece of fine grit sandpaper (for smooth walls) and brush or sand gently until the chalk comes off.  Plaster and chalk are most often made of the same substances so you merely need to remove the top layer of color to rid the plaster of the stain.

Cleaning Guides, Walls and Ceilings

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About the Author

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Susan

I'm a stay-at-home mom who used to run a small housecleaning business. These days I consider myself more or a mad cleaning-scientist. I do most of the testing for our articles - as well as helping Mark & Melanie write them.

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  1. Petronio says

    February 12, 2012 at 12:07 am

    Low-tack adhesive vehicle decals also should be removed in order that they aren’t damaged.

    Reply

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