Brush the hair on your synthetic or human-hair wig until all knots are out and the hair is flat. Synthetic hair may take longer to brush.
Divide hair into sections measuring 1 inch in diameter.
Turn a curling on to medium heat. Clip the iron onto the tip of a section of hair.
Twine the section around the barrel of the curling iron by rolling the iron up to the base of the wig. Hold for two or three seconds. Slowly pull the iron straight back to release the strand and boost the curl.
Spray a squirt or two of hairspray onto the curl to secure the hold.
Repeat until all sections have been curled and sprayed.