2- What are the characteristics required for primer?
Primer paint shall be of high transparency, easy sticking to the surface and of high permeating in the porous surfaces.

3- What are the characteristics required for paste?
It should be easy abrasion – smooth – of high thickness

4- What are the characteristics required for final finishing paints?
They have to be of high resistance for washing – high covering – highly sticking – abrasion resistance.

5- What are the characteristics required for external paints?
They have to be acrylic paints 100% resistant for ultraviolet rays – highly covering – resistant for washing and climatic circumstances.

6- What is the best technique: Aerial or non-aerial spraying?
Non aerial is better as it does not need much dilution – waste in the non aerial is less than the aerial spraying.