R 139 Styrofoam Direct Glue Up Ceiling Tile (20x20)
Decorative Styrofoam Celing Tiles are 20x20 inches, easy to install, paintable and can be glued over popcorn ceilings, drywall, plywood, sheetrock, stucco, knock-down, etc.  These tiles can be also easily painted with any water-based paints, metallic or non-metallic.  Depending on the finish you can achieve plaster or real tin look for less and fast.