Explain the process of surface preparation and painting a wall. | Building Constructions

The correct preparation of surface plays an important role in preserving the properties and life
of the paint.
For these the procedure is as follows:
1.If the receiving surface is rough, it should be made smooth by rubbing with sand paper.
2.The surface should be perfectly dry before applying the paint.
3.In a case of newly plastered surface, the surface is damp then it should be allowed to dry for at least one month.
4.If the walls are old, then all dirt, dust and rust should be removed from the surface. 
5.If oily materials are available on surface it should be removed by HCL.
6.All the nail hole’s in the wall should be filled with mortar so that the surface become smooth.
7.If the surface is having efflorescence patches they should be cleaned with dry cloth.
8.The surface should be thoroughly rubbed with sand paper, washed clean and allowed to dry before applying the paint. 

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