Most of my carving is just that, carving with carving tools, as in the photo at the top of the page. Sometimes, though, I use some other tools, such as the air powered die grinder in the picture above. Fitted with a carbide cutter, its main use is to carve where there are nails, as in the corner mitres. The "Anti-Art Deco" has mitred corners, with glue and nails holding it together. Trying to carve through nails is deleterious to carving tool edges, whereas the carbide cutter grinds right through them.
When oiling a die grinder, or other air tool, it should be run away from the work initially, to exhaust excess oil.