An introduction to colour washing, textures and decorative effects — and which ones need more training.
What you'll achieve
Understand the main decorative finishes and practise a simple effect on a sample board first.
Suitable surfaces and conditions
Practise on primed hardboard or plasterboard offcuts before any customer wall.
Finishes such as polished plasters, wood graining, marbling, gilding and some textured coatings need specialist training and plenty of practice. Treat this lesson as an introduction only.
Tools and materials
- Sample boards
- Base coat paint
- Glaze or the decorative product specified
- Brushes, cloths, sponges or combs depending on the effect
Safety precautions
- Ventilate the room while painting and drying.
- Wear eye protection when working overhead or with chemicals.
- Keep paint, solvents and tools out of reach of children and pets.
- Many specialist products (some plasters, metallic and textured coatings) have their own safety data — read it.
Step by step
- Choose one effect to practise, for example colour washing.
- Apply and dry a base coat on the sample board.
- Mix the glaze or wash exactly as the product maker describes.
- Work a small area with loose, overlapping strokes, softening with a dry brush or cloth.
- Keep a wet edge and work to natural breaks, as with walls.
- Let it dry and review in daylight — adjust technique on a new board.
- Only offer the finish to a customer when your samples are consistent and they have approved a sample.
Common mistakes and how to avoid them
- Trying an effect for the first time on a customer's wall.
- Working areas too large — hard lines form where it dried.
Troubleshooting
- Effect looks patchy: work smaller areas and keep a wet edge.
- Unhappy with sample: change the tool or dilution, not the wall.
Final quality check
- Even, consistent effect
- Customer approved sample
Drying and recoating
Drying, recoating and curing times depend on the product, temperature, humidity and ventilation. Use the times on the product data sheet; cooler or damper conditions usually mean longer waits. A coat can feel dry well before it is ready for another coat or for use.
Always follow the manufacturer's instructions and technical data sheet — they take precedence over general guidance here. This is educational guidance only, not a qualification or certificate.