I have a Taig with the hardware for metal, but mostly I turn wood pens on it. It can be done, and done well but . . . but - not knowing your level of experience or tendency to lean on the side of caution, beware. I shape aluminum with my router and carbide bits often and in some industries this is the way to do it. However, for one who is not experienced it can be dangerous.
For a wood chip or sawdust to get in the eye, there will be pain, but aluminum or other small piece of metal chip, it can be disasterous. Metal shavings can cut and even rip fingers wide open if one is unaware.
Please be aware that people come in all flavors. What I and many others can do all day long without a mishap comes from our experience, knowledge and caution. In some cases the way we do certain things make it look easy - and this is where the danger comes in - those unaware assume that it is easy. But for the experienced - instead of concentrating on the cut per se, we are concentrating on safety just as much. This is not meant as a lecture, but to say that some people get hurt for not taking the safety precautions that experienced people makes look simple.
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