Oil based paints and stains are flammable - store away from sources of sparks or heat. Old oil based paints and marine paints may contain lead, PCBs, mercury, chromium or cadmium, all of which are toxic to humans, animals and the environment. Handling Containers should be opened in a well-ventilated area. Wear appropriate respirator or cartridge mask when pouring off or mixing large volumes of oil-based paints. Identify leftover paint as latex or oil-based.
Latex paint is labeled as such or has instructions to clean up with water.
Pourable paint may be reused, unless it contains lead. To test if paint is still good, paint a small test area on clean surface and allow to dry for 48 hours. Place a piece of masking tape over the paint and pull off. If paint comes off on the tape, the paint is no longer good. To store usable paint for long periods of time, cover the opening of the paint can with a piece of plastic wrap and seal the lid tightly.