Un-activated, reduced waterborne paint from a job can be stored up to 90 days in a tightly sealed plastic container.  Be sure to record the date of the mix on the container and remember - no metal cans!!  Before spraying this leftover paint, be sure to check viscosity. Proper spray viscosity should be between 23-28 seconds with a DIN4 cup. Gently hand-shake the paint before use. Do not place toners or mixed color on shaker or mechanically agitate. Using all of your mixed paint will reduce material costs and lower your waste disposal expenses.