Hoping I can draw on the collective expertise here....we just had a brace on a stair handrail replaced because the brace was not attached to a stud in the wall, and the handrail would have pulled away from the wall if any serious weight had been suddenly placed on it, like someone falling down the stairs and grabbing the handrail. Now we have a nice secure handrail, but the handyperson has decided it is not worth his time to come by and fill in the hole where the bracket is fixed to the wall (sigh). It is not a huge hole - probably about 1/8" around the base of the bracket - but we would like to patch it up so it looks nice. It is a lathe-and-plaster wall. Any suggestions for what we should use?