Possible Clues:

• Firm, after rising cuts, goes to the wall
• Plaster on wall held mostly firm
• Cuts up firm plaster
• Plaster used for moulding and decorating
• Plaster for decorative work
• Hides from view, disposing of left over plaster
• Plaster used in moulding decorations
• On the surface one cuts it back to make it firm
• Recalled reductions company offered for plastering
• Kind of plaster moulded into decorations