Which of the following methods is preferred for paint removal on large metal areas?

The preferred method for paint removal on large metal areas is plastic media blasting. This technique utilizes plastic media to effectively strip paint while minimizing damage to the underlying metal surface. Unlike abrasive methods, plastic media blasting is less aggressive, which helps preserve the integrity of the substrate. It also reduces the risk of contamination and requires less cleanup afterward due to the reduced mess associated with plastics versus traditional abrasives.

Plastic media blasting is especially beneficial for sensitive areas or components where precision is essential, as it can effectively remove coatings without significantly affecting the metal base. Moreover, it generates less dust and is generally safer for operators, as the materials used are less hazardous than many other blasting options.

In contrast, the other methods can have drawbacks that make them less suitable for large-scale applications. Sandblasting, for example, is more abrasive and can gouge or warp metal surfaces, while hand scraping can be labor-intensive and ineffective for large areas. Chemical stripping, although less abrasive to the underlying surface than sandblasting, often involves hazardous materials and may not be practical in terms of safety and environmental considerations.