I'm not sure I would use a switching PS for something like a hot wire unless you can regulate the current without running the PS up beyond its max output. A transformer can do that, but these things have protection circuitry and will shut down if they are too overloaded.
BTW: I figure I should state that I can not guarantee anything on these power supplies. Some of them are over a decade old and/or have been rejected by the server they were in. If I find any issues or know of any problems, I'll say so. This is one reason I'm just giving them away (for the cost of shipping). That and I enjoy the challenge of figuring out how to make them work 