Pick up and set up a used oven. You can use sites like Craigslist and Freecycle to find used ovens in your area.
Prepare a well-ventilated space by covering the area with newspaper and opening windows in the room. You can also do this outside.
Put your oven in the well-ventilated room, and pre-heat it to 400 degrees.
Load your powder-coating gun with the paint, according to your manufacturer's instructions.
Point your gun about 6 to 12 inches away from the surface you wish to coat, and spray your gun.
Put your coated piece into the oven to cure for about 15 minutes. Check the directions that came with your powder coating gun to be sure. Pull your coated pieces out of the oven and use them.