Buttons and zips can make ordinary contact sounds, while a new persistent scrape may indicate a different concern. The distinction needs context rather than a guessed part name.
Understanding this situation
Note whether the sound began with a particular garment and whether it continues in ordinary appropriate loads. Do not create further trials if the appliance is already scraping, snagging or otherwise unsafe.
A useful next step
Use existing observations and report load contents. Inspect only accessible surfaces while safe. A damaged or rough surface should be assessed instead of sanded or covered, and protective parts must remain fitted.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.