Chromed Steel Fork Blade Rattle

What is the best way to stop it? The forks don't have any weep/drain holes, and there is something inside one or both of the fork blades that is rattling around.

Different forks on another bike had a similar rattle so I used the palm of my hand against the forks to repeatedly vibrate it like a tuning fork. After 20 minutes of rotating and shaking the forks, some tiny rocks, dust, and I suspect a bit of rust exited the drain holes and it no longer has any rattle.

So far, I am considering taking a small drill-bit to the base of each fork and making my own drain hole and trying to shake the pieces out, like I did previously on the other forks. Since there aren't drain holes the material inside the forks likely isn't rocks or rust, but excess pieces of weld that have broken off, so if they don't shake out the backup plan is to inject some kind of glue into the drain hole and try get all the debris to settle into it.

Is there anyone who can give advice about this idea? And also I don't know about drilling chromed forks, are there any precautions I should take?

Thanks in advance