Here are a few things you should do before painting

 1. Remove as much furniture as possible.

2. Cover other surfaces.

3. Protect light switches, electrical sockets, window frames and woodwork with masking tape.

4. Remove flaking or peeling paint with a scraper. Then sand and dust off the surface.

5. Patch up cracks or uneven surfaces with appropriate filler. When filler is dry, sand and dust off the area.

6. Make sure the surface is clean, grease-free and dry

  a. Wash surface with water & liquid detergent.

  b. For heavy and stubborn stains: Use turpentine and wash thoroughly.

  c.Fungus & mould: Remove as above, followed by fungicidal wash or bleach.