You can carve using a flexshaft motor tool and steel or Diamond
burrs.Very small burs are available in the dental industry. For
detail,you might also try engraving tools,and here is a tip.You
can use pins or sewing needles,either by hand or in the
flexshaft,and and use Diamond compond to cut,sand and polish.For
some surfaces try wooden dowels or toothpicks. Mark Liccini