Apply the finishing coat with wooden floats to a true even surface and using a steel trowel give it a finishing touch.Before applying the second coat, dampen the first coat evenly.The ratio of cement and sand for the second coat of plaster varies from 1:4 to 1:6.The thickness of the second coat or finishing coat may vary between 2 to 3 mm.After leveling, allow the first coat to set, but not to dry, and then roughen it with a scratching tool to form a key to hold the second coat of plaster.Level the surface by means of flat wooden floats and wooden straight edges.Apply the first coat of plaster between the spaces formed by the screeds on the wall surface.The ratio of cement and sand for first coat plaster varies from 1:3 to 1:6.In the case of brick masonry, the thickness of the first coat plaster is in general 12 mm and in the case of concrete masonry, this thickness varies from 9 to 15 mm. These screeds serve as the gauges for maintaining an even thickness of plaster being applied.
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