The lost art of Victorian plaster detailing is making a comeback in a new form. Modern manufacturers are finding ways to reproduce cornice moldings, brackets, rosettes and ceiling medallions, using lightweight polymers. Less prone to damage than plaster, polymer details are flexible, paintable, and they come in a wide variety of shapes and sizes.
For more on trim and molding, consider:
How To: Patch Plaster Walls
Plaster Cornice Reconstruction (VIDEO)