The contact surfaces are made from tungsten ( pretty hard ). In the old days you could buy a thin "points file" to dress them. Sanding is OK though in the old days some said not to. Have the key off, points closed then put sand paper between the points and scrub back and forth.

Turn engine so the points are at max opening, check gap. Note, points usually wear one contact in a cup shape so actual gap will be more than measured gap. In any event, + 0r - 0.002" is no big deal for the current situation.