#4791
Items that get thoroughly eroded become unusable until they are repaired, with some message like “Your shield is so burnt that it can no longer stay on your arm. It falls to the ground.” or “Your sword is so thoroughly rusted that you can’t wield it.” This is intended as a better alternative to the system in several variants where items that erode 1 stage past thoroughly get destroyed entirely. An alternative implementation is that thoroughly eroded armor is still wearable but provides no AC benefit anymore, and thoroughly eroded weapons can still be wielded but do no damage, or minimal “improvised object” damage.
This probably requires a secondary change in providing an easier way to repair eroded gear than the existing confused enchant weapon/armor behavior, especially since you won’t be able to wear armor to get enchant armor scrolls to affect it.