What's to say? Simply use masks. Yes, it's going to take time and patience. not everything can be had using seim-automated tools.
From your description I would think that it would not be necessary to stabilize or track anything. Here's what I would do.
- Duplicate the footage layer
- Create a mask on the right side of the comp that is just a little bigger than the chip in the paint you want to repair
- move the masked copy to the left far enough to cover the paint chip.
- Duplicate the bottom copy of the footage again and move the second copy of the shot to the top of the pile
- Trim the top copy so the in and out point include only the part of the shot where the hand passes in front of the paint chip
- Do a quick mask that fixes the entry and exit part of the hand moving in front of the paint chip. This may only be a frame or two
Now repeat as necessary.
The trick in doing this kind of repair is to only worry about fixing the frames that actually need to be fixed. There is no need at all to do any masking or roto work for every frame of the shot when a very simple feathered mask would do the trick just fine and a few frames of carefully animated cover the two or three frames where the actors hand passes in front of the flaw would do the job just fine.