Peinture et décoration

Matt has a low sheen that hides small imperfections, so it suits most walls and ceilings. Silk is shinier and easier to wipe clean, but it shows up any bumps or patches in the wall.

Let the plaster dry fully, then apply a mist coat (watered-down matt emulsion) to seal it before your top coats. Vinyl or wipeable emulsions shouldn’t go straight on as a first coat because they can peel.

Not without preparation. Clean and lightly sand the gloss to give it a key, then use a suitable primer or undercoat, especially if you’re going over oil-based gloss with water-based paint.