Putty needed?

Pretty much anywhere anything is attached to the skin with any kind of fastener that makes a hole needs new putty. You don't really add it, you remove the item, scrape off the dried out stuff and clean the surfaces as best you can, then replace with new putty tape. It is a slightly messy job, but not difficult, and essential to prevent water intrusion. Sometimes (when the framing is not rotted) you may need to stick a matchstick or toothpick in the original hole to give the screw something to bite into. The putty will be squeezed out as you tighten the fasteners, good idea to tighten again after a week or two. Then prior to painting you can trim off the excess with a utility knife.