What must be done with fastener heads knocked out before starting work?

When fastener heads are knocked out, proper disposal is essential to ensure safety and maintain a clean work environment. Fastener heads can create tripping hazards and might also pose risks of injury if left lying around. Additionally, they can potentially damage equipment or materials if not appropriately managed. Disposing of them properly eliminates these risks and helps maintain an organized workspace.

Reusing fastener heads is not advisable, as their structural integrity could be compromised, leading to failures during operation. Leaving them in the work area would clutter the space and increase the likelihood of accidents. Painting them does not address the safety issues or the requirement for proper management of discarded materials. Thus, proper disposal is the correct and safest action to take when encountering knocked-out fastener heads.