We never use coating ready for job; too much dosed in cement and/or adjuvants non-enunciated in composition and therefore not preserving bricklaying (walls do not breathe).
We accomplish coatings:
in the mortar of lime
in the earth
in the hemp / lime
It is always preferable to apply a tinted coating colour of which will be given by nature of some used sand. Whitewashes in lime put down in fres-co or in sécco can be applied at the request of the customer, but always in respect and harmony of the building.