What should a driver inspect regarding wheel lug nuts (tuercas de rueda) during a commercial vehicle pre-trip walkaround?

1. Ensure all lug nuts are painted silver
2. Check for looseness, missing nuts, cracks around bolt holes, and rust streaks (rastros de óxido) radiating from studs indicating loose lug nuts
3. Ensure lug nuts can be spun freely by hand
4. Remove two nuts from each wheel to reduce rotating mass