Select a paint that has primer included in the can. [3] X Research source
Many air vent covers have slats on the front, and have a squared-off or rectangular portion of metal attached to the base.
You can find breathing masks at your local hardware store. As an extra precaution, invest in a breathing mask to protect your nose and mouth.
Be sure to paint over the screws as well.
Depending on the spray paint, your vent might be dried in 1-2 hours.
Don’t cover your vents with thick, clunky furniture that will block the airflow in your home. [12] X Research source
You don’t have to purchase a product that’s marketed as an air vent cover. Instead, look for a framed print or pattern that covers the vent while allowing air to go through.