Start with the surface
New plaster, previously painted walls, wood and masonry may need different preparation and primers. Check the product instructions against the actual substrate rather than choosing by colour alone.
Choose sheen by use
Flatter finishes can soften surface imperfections, while more washable finishes are often useful in kitchens, hallways and busy family spaces. Compare the manufacturer's cleaning and durability claims.
Test colour and coverage
View a sample in daylight and artificial light, then use the stated coverage and required coats in the calculator. Strong colour changes or porous surfaces can need additional material.
Practical checklist
- Keep product systems compatible from primer to finish.
- Use the label's coverage figure for the final calculation.
