I mean, besides the obvious someone painted the cone. Not sure how or why you 'dust' with paint... nor why someone would do that to a woofer cone??! Maybe to touch up imperfections like cracks and such?

What do y'all think of this procedure?

It's on a 2032H.

https://www.ebay.com/itm/30457953921...-desc-maincntr

Description is:
Up for auction is a JBL 2032H 15" 500w 8 ohm woofer. Unit has been fully tested, no coil rub, no holes, tears or repairs. Surround and spider in good condition. Woofer has been cleaned up and cone dusted with black matte paint.