Here is a step by step of the ABS paste sanding and buffing.   Starting point with paste fully hardened   Used the Dremel tool with a sanding attachment to remove the bulk of the material. This could also be done with 120 grit sandpaper.  Next, I brought it right down with the 220 grit sandpaper to get all the extra ABS paste off and flatten everything out.  Some air bubbles appeared at this point, so I reapplied a bit of ABS paste and worked it into the repair.
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