What action is required when addressing transferable stains in a container?

When dealing with transferable stains in a container, the most appropriate action is to spot clean. This method focuses on specifically targeting the areas affected by the stains without unnecessarily damaging the surrounding surfaces or the container itself. Spot cleaning is advantageous as it allows for the removal of stains using localized treatment, which can be more effective and less labor-intensive than broader cleaning methods.

This approach is particularly important because transferable stains could potentially carry contaminants that might affect cargo or create safety hazards. By spot cleaning, the inspector ensures that only the stained areas are addressed, maintaining the integrity of the container while effectively managing the issue.

Other methods like power grinding or scraping can be invasive and may risk damaging the container's structure or finish. Similarly, choosing not to perform any cleaning action could lead to unresolved issues that could escalate over time, making spot cleaning a careful and responsible strategy.