The guy that manages my property told me that the best way to blend a touch up job is to do a feathering technique around the area of the touch up with a clean damp brush. This is something like a 4-6 inch area around the tiny dot.
Apparently this way, the touch up area is more easily mistaken for a weird way the light is reflecting or something?
Supposedly something like this: (I haven't watched the whole thing through, sorry)
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