- **Surface Preparation**: Ensure the wall surface is clean, dry, and free from dust, grease, or loose material. - **Usage**: Apply directly as supplied using a putty knife or trowel. Spread evenly to cover imperfections. - **Compatibility**: Can be used on cement plaster, concrete, chipboard, plywood, and similar interior surfaces. - **Priming**: If using Berger VIP Super Gloss Robbialac Enamel or All-Rounder Matt Finish Enamel as a topcoat, apply a thin coat of Berger Plastron Primer over NU Wall Putty before painting. - **Finishing**: After drying, sand the surface lightly with fine sandpaper to achieve a smooth base before applying paint.