The iron and damp cloth are ok for small dings. I have an old tea kettle with a 4 ft length of automotive heater hose fixed to the spout. I heat the kettle on a coleman (Naptha fuel)camp stove in the garage. High volume steam can really lift some serious dents, especially if you give it 2-3 applications. A drawback to this setup is that it puts a fair bit of moisture into the wood, and you need to let the stock dry for at least several days before you attempt the next step in the refinishing process. It will also pretty much destroy any existing finish so it's not much good for touch-ups.