Set up a spray space
The smaller the spray gun, the smaller the work area you'll need. But even a touch-up sprayer can be dialed back to apply water-based finish in a tabletop spray booth made from a large cardboard box.
Whether spraying water-based or flammable finishes indoors, position a fan to draw fresh air into the space, around your workpiece, and toward a window or door without pointing the fan directly at your workpiece. Avoid drawing flammable vapors into the fan motor, where they could be ignited. And wear a respirator made to filter organic vapors.
Then arrange a low-angle light to reflect where your finish lands and call attention to any missed spots. To make small and medium-size projects easier to rotate for spraying, place them on pieces of cardboard or a turntable.
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