Reverend Uncle Bastard
If I possess the Bandages, or Whisky, or some similar item... can I use the action (In Bandages case, remove 2 facedown damage) on other players in my space...
If the answer to the above is "yes" can I split the removal...i.e, one from my investigator and one from a buddy?
An item that can be used on a different investigator than the one holding it will state that very specifically on the card. So unless it says you can then you cannot. I do not have the cards in front of me, but I believe neither the bandages nor the whiskey state that you can use them on a different investigator. So far there are no items that allow you to "split" benefits.