Unscrew the knobs from behind the drawer front panels. Remove the knobs and save the screws.
Place the wooden knobs on a sheet of newspaper. Set up the newspaper painting area outside or in a well-ventilated area.
Paint wooden knobs with glossy or matte acrylic craft paint and a small paint brush. Cover the knobs thoroughly with the paint. Let dry about 30 minutes. Apply a second coat.
Let the painted drawer knobs dry completely before reinstalling them on the drawer panels.
Place the metal knobs on a sheet of newspaper. Set up the newspaper painting area outside or in a well-ventilated area with low humidity with a temperature between 50 and 90 degrees.
Apply a spray primer if the metal knobs have never been painted before. Follow the paint manufacturer's instructions for drying time between priming and painting.
Hold the spray paint nozzle approximately 10 to 14 inches above the knobs. Spray on a thin coat, using an even spraying motion. Let the paint dry, then apply a second thin coat.
Let the spray-painted metal knobs dry completely before reinstalling them on the drawer panels.