Specify what the surface needs
Retaining sound existing work can reduce unnecessary preparation and material use. Assess compatibility and condition before deciding to strip or replace a finish. Repair and decoration should each have a defined purpose in the scope.
Compare products carefully
Review product information for the required surface and use, including emissions information where relevant. Broad labels such as natural or eco do not establish suitability on their own. A sample and a clear coating specification are more useful than an unsupported environmental claim.
Plan quantities and maintenance
Measure the work, consider colour coverage and agree how useful leftover materials will be labelled and stored. Ask about disposal arrangements for waste paint and preparation materials as part of the brief.