Remove a dent from your car with a hairdryer and some CO2
This simple handy tip to get dents out of a car, might work best on larger shallow dings, rather than smaller deep ones. I suspect you can use any
very cold gas, rather than just the CO2 in the video.
From the comments: For small dents, use a piece of dry ice instead of canned air. After using the hair dryer, hold a small piece of the dry ice in a
pair of pliers and rub the dent with it until you hear the dent "pop".