Avodah Zarah 42: The Destructive Power of the Dead Sea

More on finding shards, and the problematic nature of tangible hands, feet, etc., when found. But why are those tangible imagery forbidden? The idol has been destroyed! Also, the possibility of revoking the idolatrous status, and rendering it permitted for use altogether - how actively, physically must that be done? Or does it have happen on its own, without your intervention? Also, a new mishnah! Certain figures that are considered idolatrous and need to be fully "erased" - at the Dead Sea: sun, moon, stars, dragons. But are those the only possible things that were worshipped? Plus, the issues in depicting people's faces.