Choose for the surface
Start with the substrate and existing coating. A wall, a door and external metalwork have different requirements. Compare the selected product’s preparation and application instructions before deciding that one finish will suit the whole brief.
See the colour in place
View physical samples beside flooring, curtains and fixed furniture. Look at them in daylight and under the lights normally used in the room. Keep a written record of the colour and the finish: the colour name alone is not a complete specification.
Discuss care as well as appearance
Consider how frequently a surface is handled or cleaned. Check the product information for curing and cleaning requirements. A sample can help compare sheen without relying on the appearance of an image on a screen.