I used the cut off wheel from a dremel for an interior piece. It worked better than I expected. The wheel helped keep it cutting very strait. The only downside is the wheels don't last very long. Chipping wasn't a problem (it was at full speed 35k rpm). You can also line the surface with masking tape, I think that'll help keep a smoother edge too. Once its cut, it'll be a sharp edge though.
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