New Surface

Ensure that substrate is fully cured (at least 28 days). Correct surface defects such as cracks and holes with a suitable putty and sand down with 'medium' sand paper to a smooth finish. Wash and rinse with water whilst brushing. Apply a suitable fungicidal treatment where necessary.

New concrete should be neutralised with Etch Cleaner before rinsing. Do not neutralize plaster.

Previously Painted Surface

Surface Examination

Shave the old coating in various places with a knife to ascertain the flexibility of the film and its present adhesion to the substrate.  Inspect the quality of the substrate .If the old coating and/or its substrate have a tendency to powder , shatter or disbond easily under the knife or if blisters or other defects are observed, it would indicate that total removal of the old coating is advisable.

Total Removal of the Old Coating or Sections Thereof

Remove by mechanical means or by stripping with paint remover. Proceed as per specification for the preparation of new surfaces.

The Old Coating Will Not Be Removed 

Proceed as per specification for the preparation of new surfaces.  In this case ignore steps which require neutralising. The old coating on concrete and plaster surfaces should be sealed before painting.

Surfaces Should Be Dry Before Painting

The above mentioned procedures may be substituted by approved international norms for surface preparation.