The plaster crown is the centerpiece of the theater's proscenium arch, which frames the top of the stage. Anneleen Lindsay Experts were stumped until February, when Laura Clair, a glass technician ...

recommends two coats of plaster, as this will usually give you a better finish. ‘The flattening-off stage is the most important part of plastering,’ says Ross. ‘If you don’t get the plaster flat at ...