How to Repair a Car's Hail Damage with Dry Ice
Hail damage to your car can be fixed with a mix of extreme cold and heat, This cause the metal to contract and then expand quickly, eliminating the dings.
Step 1 - Ice
Buy some dry ice from a dealer and keep it in an ice chest. Being sure to wear gloves, place a piece on each of the small dents cause by the hail damage. Put a towel over the pieces of dry ice and leave them in place for two minutes. At the end of that time put each one back in the ice chest.
Step 2 - Heat
Turn your hair dryer on full and hold close to each piece of hail damage. The rapid change in temperature will make the metal expand. Don’t be surprised if you hear a pop. The dent should could out quickly. Go one section at a time with the ice followed by the heat until all the hail damage has gone. If there are small cracks in the paint, rub lightly with extremely fine steel wool and then wipe with a damp cloth before allowing them to dry fully.