The surfaces should be dry, clean and free from contaminates such as grease, oil, dust ...etc, which can result adhesion of the paint to the surface.
New Surfaces:
Apply one coat Sealer 1800 on cement, concrete and gypsum surfaces then two Latex Putty coats. Use two or three coats Q-Tone.
Repainting:
Cement surfaces should be cleaned with water and soap, rinse thoroughly with water insure the surface is free from all contaminates then let the surface to dry well for flakes or defect painted surface use a sanding paper to release it then apply previous item.
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