Here is a Youtube video of how things are done by a qualified luthier:
He doesn't use steam, he uses his heat probe method of removing a neck. He is the first person that I saw do this, and my own luthier friends are now considering going this way for neck resets, due to the lower possibility damage due to steam used with a more traditional method. Note that the Hummingbird is similar to Guilds in that the finish was sprayed over the neck body join after the neck and body were mated. He shows how to work around this. There is nothing really much more difficult with this neck reset than any neck reset without the finish applied prior to the neck and body being mated, its just one added step, and not a major one.
He doesn't use steam, he uses his heat probe method of removing a neck. He is the first person that I saw do this, and my own luthier friends are now considering going this way for neck resets, due to the lower possibility damage due to steam used with a more traditional method. Note that the Hummingbird is similar to Guilds in that the finish was sprayed over the neck body join after the neck and body were mated. He shows how to work around this. There is nothing really much more difficult with this neck reset than any neck reset without the finish applied prior to the neck and body being mated, its just one added step, and not a major one.