From a distance, this high-density polyurethane molding masquerades as plaster. The lightweight paintable foam may have less-crisp ornamentation, but it's easy for homeowners to install themselves.
No. UT-5303, 5½
inches high, about $4.60 per linear foot uninstalled; GoCeilingMedallion.com
high, about $14.50 per linear foot uninstalled; Hyde Park Mouldings
For step-by-step help with this project, see How to Install Easy Crown Molding