Lay out some newspaper or craft paper in a well-ventilated area.
I did this outside, which really offers the best ventilation, and on a day that is not windy or rainy (obviously).
Lay out all your mason jar bands onto the paper, making sure several inches separate them.
Note: if you are sensitive or have respiratory issues, I also recommend wearing a protective mask before spray painting.
Spray paint the bands well with orange spray paint.
I spray painted one side first, allowed to dry for a few hours, then I flipped them over and sprayed the other side. Make sure you are spraying the sides well too.
Allow lids to dry completely overnight.
Once lids are completely dry, it's time to tie them all together. First, make sure all your mason jar bands are facing the same direction.
Wrap a piece of orange yarn through the bands then pull tight and tie a double knot.
Cut off any excess string.
Once you have it tied, it should just be a matter of gently separating the lids so they are spaced evenly.
Pop a few cinnamon sticks in the middle to be the pumpkin stem and you are done!