There are many problems that we face during painting process, including:

1- Not covering the paint well, of the reasons for this :
- Dilution of paint over the limit recommended by the manufacturer.
- Using bad spraying tools or rollers and brushes.
- Non usage of primer coat between the old and new paints.
- Existence of dark color under the new paint.

2- Rough touch of the final paint :
- Using rough pastes.
- Not applying abrasive paper well.
- Using bad abrasive tools.
- Existence of dust during painting process or paining in bad climatic circumstances.

3- Non dryness of paint :
- Non-mixing the paint well before usage specially in oily paints.
- Using dilution materials (thinner) not suitable with the kind of paint.
- Existence of high humidity on the surface.
- Temperature decrease during painting process (5 C.◦ and below).

4- Color variation :
- Not mixing the colors well during packs opening.
- Too much dilution of paint or difference of dilution rate from one container to another.
- Usage of various spraying tools as spraying tools should be unified.
- Variation of the number of paint coats from one surface to another.

5- Low shining :
- Usage of paint directly on the mortar or on rough surface as an isolating coat has to be applied to maintain the shininess.
- Applying paint in the presence of very high humidity or unsuitable climatic circumstances.