Keep all your leftover paint together: Your leftover paint can become a treasure trove for inspiration the next time you want to paint a model car. Keeping all your leftover paint together will help you see at a glance what colors you have and which you'll need for your next project.
Buy or make an organizer: Upgrade your paint storage situation with a holding container. This solution can be as simple as a plastic box to hold your small paint cans and bottles, or it could be a large shelf where you keep quarts and gallons. A paint organizer can also keep your paint safe from pets or children at play.
Take it to a hazardous waste site for proper disposal: If you decide you want to get rid of your paint, take it to your local hazardous waste disposal site. You should never throw paint away with your regular garbage or dump it down the drain. Call your municipality or do online research to determine the best way to get rid of paint in your area.