Almost time for the machinist!
Yes
When i get a block back from the machinist, the only time it come out of the bag is to work on it.........then usually get washed with soap and water, cyl bores main jurnialas......any bare metal get WD-40.
If its going to be apart for a long time i cut up a bunch of cardboard and throw in the bag to sock up any moisture left behind.
You can't clean your block to many time.