Finishing and Polishing - Composite

• It seems as if using a brush with some sort of abrasive gets into the grooves and fissures of the occlusal surfaces of my restorations better than using rubber cups. Is there a brush that uses several pastes of different grits to polish composite and porcelain?
• Which burs are suitable for carving or shaping anatomic cusps in amalgam or composite restorations?
• What is the best polishing system for anterior composites?