I came across it while googling for brake fluid disposal. http://www.popularmechanics.com/cars/how-to/maintenance/2063646
PAINT AND GASOLINE Most automotive paint used in the aftermarket is solvent-based, either enamel or lacquer. (A lot of new cars are painted at the factory with waterborne paint systems.) And many municipalities won't take this type of paint or its companion thinners as waste. If you have a secure, well-ventilated place, one that isn't likely to start a fire or poison children or pets, you can do what we usually do for small quantities of leftover or contaminated paint thinner and gasoline—just leave the can open in a safe, warm place until it dries completely. (Don't try this with coolant—it takes far too long to dry out.)
BRAKE FLUID Brake fluid is alcohol-based. It's toxic when ingested. When bleeding brakes, catch the runoff in a jar. Brake fluid from a jar that's been opened for more than a few months probably has absorbed enough water to reduce its boiling point past the point of safety. To dispose of new or unused brake fluid, pour it into a container of cat litter. The brake fluid will evaporate within a few days. As with paint, keep this away from pets and children, and any source of ignition.