[Animats]

As a practical matter, that's backwards. One pass with the heavy raking machinery will remove 99% of the trash. That's the heavy lifting. Record GPS-tagged video of what the rakes are picking up. Then make a pass with a strong trash magnet on a pickup truck to get small ferrous metallic junk that made it past the rakes. Then do a foreign object walkdown with the team, to catch sequins, nonmagnetic stainless steel needles, and rebar and lag bolts that need to be pried or dug out. It's the final inspection that needs humans.

Do you have to clean up glitter?

[stonegray]

Yes, we clean up glitter, paint chips, oil stains, rust debris, etc.