Sindoora is made in two parts– cap and body. To make Sindoora, small wood blocks cut from the log using ara machine (saw) then a carver would peel one side of block to make it fit for the chuck of turning machine or lathe.
This shape is further used to give required shape for the Sindoora Vessel. After this, the application of colored shellac (lacquer) on work is done on the lathe only. While the lathe keeps revolving, the heat generated by friction softens the shellac, making the color stick to the surface of the work. Then they shine the color by rubbing a local material like peel of bamboo.
For more details: - http://www.dsource.in/resource/sindoora