Things you will need
Instructions for painted walls
- Mix 1/4 cup of water and 2 tablespoons of baking soda in a small bowl to make a paste
- Wring out a clean, wet cloth or sponge
- Dab the cloth or sponge into some baking soda mixture and rub it on the mark. Do this in a circular motion
- Rinse the wall with another well-wrung rag or sponge
