as for the rust thing,better check the hinges, its where rust is usually found...even in old cars...

as per turko rust converter. as per my trusty latero(and some other latero's i asked) its pretty nasty. and you have to wash it away CLEAN bec it will eat away on the metal if you leave it there,so they advised me to clean it w water,specially on corners and spots where it may accumulate...anybody in the house who can verify this?