One way to reduce spray paint odor is by minimizing its curing time. Paint the furniture outdoors on a dry, moisture-free day, if possible. If you already painted the furniture, set it outdoors on a non-humid day. Sunny weather helps even more. Place it outside in the sun, bring in at night so it won't get moisture on it. Do this for several days until the smell is gone and the paint cured. The air movement helps cure the paint and will cut down on the odor. If unable to keep the furniture outdoors, store it in a garage for a few days, or in a well-ventilated spare room of the home.