You would need to make sure that the wall you are going to paint on has not been painted with an oil-based paint, this would inhibit the Tjhoko Paint from sticking to it.
If this is the case, you would need to apply a Universal Undercoat or remove the oil based under layer.
All peeling paint would need to be removed. Cracks need to be filled and thereafter cleaned with Lacquer Thinners.
You will then be ready to paint.