The second step is called polishing, this is where the plaster is sprayed or brushed with a light film of water and then polished down with a trowel or sponge to produce a smooth finish. As of May 2011 the cost of materials for a single layer of plaster skim are between 50-75p per m 2.he second step is called polishing, this is where the plaster is sprayed or brushed with a light film of water and then polished down with a trowel or sponge to produce a smooth finish. As of May 2011 the cost of materials for a single layer of plaster skim are between 50-75p per m 2.
Required length of work term. 1  Work terms must consist of full-time employment (35-40 hours per week) for 16 weeks (matching the length of a four-month academic term). Work terms generally start and end on the dates published in Quest, under Important Dates.
Shorter work terms can be approved if you are unable to secure employment for the entire 16 week period (e.g., unable to secure employment by the published start date of the work term or for documented reasons beyond your control). In such cases, a minimum of 12 weeks must be worked.