How to Touch Up Paint So It Doesn't Show

A touch-up that shows is usually not a color problem. It is a technique problem. The patch is the wrong sheen, the wall was dirty, or the new paint was brushed on in a way that leaves a ring. A few small habits make the repair almost invisible.

Before you start: older homes

If your home is older, the paint may contain lead, and it is dangerous in dust. Do not dry-sand or scrape painted surfaces if your home was built before about 1978 and the paint is peeling or flaking. Have the paint tested, and use a professional trained in lead-safe work for large or damaged areas. Small, tight, well-adhered touch-ups are a different matter, but if you are unsure, test first.

Step 1: Use the right paint

1. Find the original paint if you have it. Stir it very well, because the pigment settles to the bottom.
2. If you do not have it, take a small chip to a paint store for a color match. Tell them the sheen: flat, eggshell, satin or semi-gloss.
3. Test it on a hidden spot and let it dry completely. Wet paint always looks different.

Step 2: Clean the wall

4. Wash the area with mild soap and warm water, and let it dry. Paint will not stick to grease, dust or crayon, and the patch will show.
5. Sand a rough spot lightly with a fine sanding sponge if there is a bump or a raised edge. Wipe off the dust.

Step 3: Prime any patched area

6. Prime bare spots where you filled a hole or scraped the paint. Without primer, patched spots show through the paint as a dull patch.

Step 4: Apply the paint

7. Use a small roller, not a brush, on a flat wall. A brush leaves brush marks and a visible outline. Roll lightly with little pressure.
8. Start in the middle of the damaged spot and roll outward, lifting off at the edges so the paint thins out gradually.
9. Apply thin coats. Let the first dry, and add a second if you need it. Thick paint dries with a ridge.
10. Do not touch it while it dries. Leave it for several hours.

Step 5: If it still shows

If the area looks different once it is fully dry, paint the whole section of wall from one corner to the next, or from the ceiling to the floor. A natural break hides the edge. This is better than adding more layers to a small patch.

Matching a wall that has aged

Paint fades and collects a film of dust and cooking residue, so fresh paint on an old wall often looks a shade off even when it is the same color. To blend it:

• Wash a wider area than the patch, so the old paint is as clean as it can be.
• Feather the edges by rolling the paint out six to twelve inches beyond the damaged spot, using a nearly dry roller at the edge.
• Let it dry fully before you judge it, because paint looks darker or lighter while wet, and the sheen changes as it cures.
• Paint the full section from corner to corner if it still shows. It is more work, but it always blends.

Clean up and store the leftovers

Wash brushes and rollers right away with warm soapy water for water-based paint. Press plastic wrap against the surface of the leftover paint before you close the lid, seal it tightly, and label it with the room, color name and date, so the next touch-up is easy.

Common mistakes

• Painting over a dirty wall. It will show.
• Skipping primer on patches. It leaves a dull spot.
• Wrong sheen. A glossy patch on a flat wall always shows.
• Brushing on thick paint. Use a roller and thin coats.

When it is bigger than a touch-up

If the paint is peeling in sheets, bubbling or stained, the problem is under the paint. See the list below.