Rust-Oleum offers advice on how to paint a variety of furniture surfaces: outdoor/wocker, wood, plastic/laminate, metal, decor items. Paint in temperatures between 50F and 90F. Spray paint in a well ventilated area, and avoid spraying in windy conditions. When using Ultra Cover 2X, Universal, Universal Metallic, and FlexiDip, the humidity should not exceed 65%, while for Mirror Effect and Stops Rust the humidity should not exceed 85%.
This is done by applying spray paint through lace, then later, edging the pattern in another colour by hand and painting the rest of the chair the same colour as what was sprayed. Finally, would need to be varnished. Not a fast project, but interesting!