If the coating history or material condition raises a hazardous-material concern, ordinary sanding should not proceed on an assumption. Share existing product records where available. Specialist testing or removal is outside the scope and must not be replaced by a disclaimer after disturbance.
Discuss nearby doors, plants and occupied spaces before sanding. Appropriate containment and collection depend on the site and accepted material. This ordinary preparation service does not include hazardous dust remediation or work on a coating whose safety has not been established.
The abrasive sequence depends on the accepted timber, existing finish and intended next product. A single aggressive pass is not a universal solution. The quote should identify the preparation goal rather than promise removal of every deep mark at any cost to the boards.
Prepare and sand accepted sound boards with appropriate abrasive stages and dust control, within the agreed accessible area. Scope limits: Sound ordinary accessible boards only. No structural restoration, rot concealment, hazardous coating removal, asbestos or specialist dust remediation.