Paint-less dent removal, heat then chill? Options

[tradisrad]

I did a web search on paint less dent removal and I found this video that uses a hair dryer and an air duster: http://www.metacafe.com/watch/501379/remov...with_airduster/
Has any one tried this method? I also came across a similar video that uses dry ice instead of the duster can?
I went out to give it a try only to find that my duster was empty and then I thought I should consult with the World to see if I am getting in over my head!

[bigkensteele]

I had a black '97 Integra that had hail damage, and bad. Probably 100 dents or more. The paintless guy worked wonders. Got every one of them out, except for a couple on the side pillars, which he made look much better.

The problem with this technique is that they often have to drill holes to get to the area, and then they just put a factory looking plug in the hole without priming or painting the drilled surface.

I found a guy who uses the spoons and long tools that look like dental picks. He did a pretty good job on our newer cars. I asked him to look at my 911 and 914, and he said that the metal on older cars was too thick, and he could not get good results. I think that he was being honest, but it could be that he didn't want to risk working on those, as he was just doing this on the side.

I don't really know anything about the heat and shrink methods.