Has anyone used dry ice to remove minor dings? I've seen some videos where people use dry ice or an upside-down can of duster spray (for keyboards) to freeze the dent. The dent pops out due to the metal contracting. I'm thinking of trying this but not sure what it'll do to the paint. Plus it seems to work better on medium sized dents several inches across, however my car only has a 1" door ding.