Set the resin furniture to be painted outside, if possible, for best ventilation. Place plastic or cloth tarps on the ground.
Use an ammonia-based cleaner if your resin furniture is old. Wipe it down to clean the surface. If your furniture is new, wipe it down with a standard paint thinner for best adhesion. Allow to dry.
Follow all instructions on the paint can; ensure it is designated for use on plastics. Shake the bottle of spray paint for about 30 seconds. Hold the nozzle of the paint can down and slowly begin to move the paint can back and forth over the furniture's surface. The can should be about six inches away from the resin wicker. Apply light, even strokes to avoid a heavy coating of paint.
Allow the resin wicker furniture to dry. The paint will dry to the touch in 15 minutes. However, wait one week before use, to allow the paint to achieve maximum adhesion.