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Gene Shuey does a very good job of showing the different ways available to refinish and what it will take to setup the method you chose. If you are interested in bluing your firearm yourself, renting this set will walk you through several ways to do it.
You should be familiar with disassembly of the firearm you are working on as that is not covered here. Tips are provided for dealing with certain assemblies ans surfaces but no specific firearm tear down is covered.