What is the specified abrasive material recommended for use with hand-held abrasive tools?

The specified abrasive material that is recommended for use with hand-held abrasive tools is glass beads. This choice is correct because glass beads are non-metallic, lightweight, and provide a gentle yet effective cleaning and finishing action without damaging the underlying surfaces. They are often used in applications where a non-aggressive approach is essential, such as in cleaning delicate surfaces and components found in avionics and aerospace settings.

Glass beads also offer benefits in terms of producing a uniform surface finish without creating sharp edges or heat buildup, which can be detrimental to some materials. Their effectiveness in removing corrosion while maintaining the integrity of the surface makes them a preferred choice over other abrasive materials.

The other types, such as steel wool, may be too rough and could leave fibers on surfaces or scratch them. Aluminum oxide is more abrasive and would be better suited for tougher materials, while sanding discs typically have a more aggressive cutting action that may not be necessary or appropriate for maintaining delicate avionics components.