Here's what you'll need: spray paint in the fall color(s) of your choice, dryer vent tubing, spanish moss, twigs, metal cutters, scissors & hot glue.
Stretch and bend your dryer vent tubing to any size you desire to form a circle. Cut the end with your wire snips.
Using your hot glue gun, glue the ends of the vent tubing to form a circle. This now becomes your pumpkin.
The vent tubing is very flexible and depending upon the size of your pumpkins, you can make several out of one tube. In my case, I used left over vent tubing that I had at home that had been previously cut for the dryer, so I was able to get 4 good size pumpkins out of a remnant of tubing.
Next, using quick, short passes, spray paint your pumpkins as desired. I strongly urge you to do this outdoors. This took me about 4 light coats to reach the desired shade I wanted. It had also been raining off and on, so I had to do it when the weather permitted.
Finally, decorate your pumpkins by hot gluing spanish moss atop of the pumpkin and using the twigs to form a stem.