Separate a surface defect from rocking, flexing, or poorly supported work before changing the abrasive, block, or sanding pressure.
Tell a deep scratch from lost surface geometry, stop the sander fault that made it, and choose a repair that does not enlarge the hollow.
Use scratch direction and a clean control strip to separate trapped debris, a damaged support, and an unfinished previous-grit pattern.
Inspect a peeling furniture finish to decide what must be removed, what may stay, and which preparation or drying problem needs investigation before recoating.
Choose a dust-removal cloth that fits the named finish, instead of treating every tack cloth as interchangeable.
Keep the wood beside a resin pour from becoming a hollow. Use firm support, short leveling passes and a straightedge before refining scratches.
Check a curled sandpaper sheet for backing damage, loose grit and poor support contact. Learn when to replace it and how to prevent another bent pack.
Use a sanding timer to spot process changes while keeping surface inspection in charge of every grit change.
Remove attracted dust from acrylic with compatible cleaning methods. Separate static buildup from real scratches before starting another sanding step.