What action is recommended for customer marks that would not be acceptable for shipment?

The recommended action of spot cleaning or painting for customer marks that would not be acceptable for shipment is important for maintaining the overall appearance and marketability of the container. Spot cleaning addresses specific areas where marks or damage may detract from the container's condition, rather than undertaking more extensive measures such as a full repaint, which may not be necessary or cost-effective.

By using spot cleaning techniques, inspectors can make minor repairs that ensure the container adheres to standards without altering its entire surface, preserving the integrity of the container's original paint and branding. This approach allows for a balance between maintaining quality and efficiency, as it targets only the areas of concern while keeping the container ready for shipment. It also helps to prevent delays in the shipping process that may arise from more extensive repair work. Hence, spot cleaning or painting becomes a pragmatic solution in container management.