Save leftover latex paint for your next touch-up.

A nearly finished can of paint can be useful when a wall needs a small touch-up. The trick is keeping both the paint and its identifying information in good condition. Start with leftover household latex paint in its original container. Other coatings may have different storage requirements, so always check the label.

What you’ll need

• Clean cloth
• Rubber mallet
• Permanent marker
• Phone camera
• A secure storage shelf

Take it step by step

1. Photograph the color formula and product label before handling the can. Write the room, wall or trim location, sheen, and opening date on the lid. Similar whites can be surprisingly hard to tell apart.
2. Wipe fresh paint from the rim and lid using a cloth. Keep debris out of the can and follow the label for cleanup. Do not force a damaged or heavily rusted lid back into place.
3. Seat the matching lid evenly. Tap gently around its edge with a rubber mallet until it is securely closed; avoid denting it with a metal hammer.
4. Store upright in a secure, temperate location out of children’s and pets’ reach. Follow the product’s temperature limits and keep it away from heat or freezing conditions.
5. Keep a simple phone note listing the paint and its shelf location. Before a future touch-up, check its condition and try a small hidden patch after stirring according to the label.

When to ask for help

Ask a paint retailer about proper disposal if the paint smells sour, remains jelly-like after stirring, or the container leaks. Never pour unwanted paint into a sink, drain, or septic system.