Is it possible sculpt things as baluster? In real world it is realized on lathe device. Sculpt rush should be mirrored by rotating center of mesh.
If you want to sculpt rather than just use something like the spin modifier there is radial symmetry in the Symmetry panel in sculpt mode
http://wiki.blender.org/index.php/Doc:2.6/Manual/Modeling/Meshes/Editing/Sculpt_Mode#Symmetry_Menu