A mark on intact paint is different from a dent, torn wall surface or loose coating. Show the affected area close up and from across the room. The underlying condition decides whether touch-up painting is appropriate or a separate repair is needed.
Staining from a leak or damp wall needs its cause addressed before a cosmetic finish is considered. Explain any moisture history and whether the area is dry. Touch-up paint is not a remedy for an active leak or concealed building defect.
Peeling, powdery or poorly bonded paint may not accept a simple topcoat. The surface and any preparation method need review. Hazardous coatings or suspected asbestos must not be disturbed as part of an ordinary small painting request.
The agreed service covers sound interior walls, light preparation, agreed local coating and colour-match assessment. Exclusions: Whole-house repainting, external facades, unresolved damp, lead/asbestos disturbance, structural patch work.