What method should be used for removing dry adhesive that is unacceptable for cargo shipment?

The most appropriate method for removing dry adhesive that is considered unacceptable for cargo shipment is the power grind/paint technique. This method ensures a thorough removal of the adhesive, as it utilizes mechanical means to grind away the unwanted material. Power grinding not only adequately removes the adhesive but also prepares the surface for subsequent treatments or coatings if necessary.

Using power grinding or painting is particularly effective when dealing with stubborn adhesives that have bonded strongly to the container material. It allows for the removal of any residues that might not be effectively cleared through simpler methods, which is crucial for maintaining the integrity and cleanliness of the shipping container.

Other methods such as scraping might not fully remove the adhesive, potentially leaving residues that could affect cargo. Spot cleaning is usually limited to smaller areas and may be insufficient for extensive adhesive contamination. A hot high-pressure wash can be effective for some contaminants but may not penetrate or effectively remove the dry adhesive without the additional mechanical abrasion provided by grinding. Thus, for cases involving unsafe or unacceptable adhesive, power grinding techniques provide a more comprehensive solution.