I normally use a scalpel for post-processing. Usually that means scratching off the Brim / support material and other irregularities. I also clip / trim any edges with the blade. That doesn't really lead to good results, but it's fast.
There is a way of "chemical post-processing" by means of putting the printed object into a bath of a suitable solvent to abrade any small and thin irregularity. But I never tried that and I don't know any more details about this, except that there is some thread here in the forums about this topic.
Maybe you could develop a low power sand-blasting Dremel (with glass pearls but I don't know how that's called in english), I would definetly buy one
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IRobertI 521
A dremel or other similar rotary tool will spin too fast and create too much friction to be useful in most cases I would think. Even slowly drilling a part may cause too much heat. Cooling with water helps in most cases but I think the speed of a rotary tool is simply a bit too much.
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