How to Touch Up Flat Paint Walls

Pick up paint swatches at a home improvement or paint store and compare them to the wall to select a color as close to the original wall paint as possible. Purchase a small can of the wall paint in the selected color. Make sure you purchase flat paint. If you have paint left over from the original painting, you can use that if it has not dried.

Wipe the wall with a damp sponge to remove dust and dirt. Allow the wall to dry completely.

Dip a brush in the paint and dab the paint onto the damaged area, starting on the inside and working your way to the outside edge. Overlap the new paint onto a bit of the old paint in order to blend the paints. Allow the paint to dry completely before determining whether you need to apply another coat. If you are touching up an area larger than three inches square, skip this step and go to Step 4.

Paint the entire damaged area with a paint brush. Do not overlap the new paint onto the old paint. Using a mini-roller, quickly roll the sponge brush over the edges where the paint meets in order to create a texture between the two. That will help the two paints blends and make the repair less noticeable.