Create a "Paint Key"

A paint key records exactly what was applied to each surface so a future touch-up starts with the right product. A color name alone is not enough.

Make the record

1. Photograph each can’s front label and tint/formula sticker. Include the product line, base, color code, sheen, and batch information if present.
2. Create one row per surface: room, wall/trim/ceiling, brand, product line, color code, sheen, date, and label-photo link.
3. Mark uncertain entries as unknown rather than inventing a match. Ask the painter for the original specification if available.
4. Store approved leftover paint as its label directs, out of children’s reach. Add the storage location to the record.
5. Back up the file with your home manuals.

Check the result

Open a label photo from each row and confirm it is readable. For a touch-up, test the actual paint on a small area and inspect after it dries. Age, fading, product changes, and application technique can still prevent an invisible match; repainting a whole wall may be necessary.

Use a blank entry such as “Bedroom trim — product unknown” rather than a fictional paint example.

Sources and scope

• Sherwin-Williams: paint planning, primer, and leftover touch-up paint

These references support the guidance above. Source review is not a hands-on test of your home or a certification of a product. Follow the instructions for your exact model and local requirements.