I am looking to replace an old door knocker with a new one I've
purchased. Removed the old one but it's two holes don't match the new
one, so must fill one hole. There's also some rough edges to the paint
around the hole.
I assume I just swipe over it with some putty of some sort, let dry,
then sand down to be smooth as possible with rest of painted door, then
touch up with paint (I have the proper, matching paint with which the
door was recently painted).
What kind of putty should I use? How long need I wait before sanding?