A small surface chip or finish defect can be reviewed when the surrounding material is sound. Show the whole window as well as the mark. The service is deliberately limited and does not imply that any damaged window frame can be restored.
A stiff handle or difficult opening may concern hinges, catches or other hardware rather than the frame finish. Describe how the window operates. Suitable hardware work belongs to its own service, and a cosmetic frame patch will not correct that mechanism.
Soft, crumbling or deteriorated timber is different from a surface blemish. Explain any known water exposure and show the surrounding area. Rot remediation has a separate repair scope, while a severely deteriorated frame may require a specialist replacement assessment.
The agreed service covers small cosmetic timber/frame finish repairs after condition and access review, without disturbing glass or the glazing system. Exclusions: Frame replacement, structural joints, glass/beading removal, seals, sash restoration, rot remediation (existing separate intent), hazardous coatings.