There seem to be 2 bugs with rust popping up in vasiliy's fork (probably common to LIVAN as well)
1) I changed the material of my helmet and my body armor. Neither one was rusty previously. when I change the material, it's fine, but when I take another step, they are suddenly "very rusted"
2) when I repair these very rusted items either with a smith or a scroll of repair, they are fine, but a few steps later they are suddenly very rusted again.
Sad, it's dropping my helmet AC from 33 to 20 and armor from 41 to 21