The wasted paint can be a cause of chaos so; it should be disposed of correctly. You can check the back of the cans for instructions to avoid wastage. If you read instructions thoroughly, you will be able to use the right amount required for your job. In case, you have surplus paint; you can use it for your creative jobs, offer it to friends/family, or you can give it to community groups. If you have nobody nearby, then you must call the Local Authority because they offer special facilities for disposing of paint. Never pour surplus paint down the drains or watercourses, NEVER!!