The methods previously given are very good. I have only a few additions.
If the damage is really severe, automotive two-part "bondo" filler is
a good choice. For small spots, a lacquer-based spot putty would be
quicker and compatible.
I have used several black automotive lacquers and found R&M (Rinshead
& Mason) brand to be significantly blacker than other brands. When I
have tried to use other brands to repair or touch up something painted
with the R&M material, they look only dark gray against the R&M black
lacquer.
This finish is extremely easy to maintain if the original materials
are used. When a small area is damaged, only that area needs to be
refinished. The repair will blend in easily with the original finish
once it is thoroughly dry. I believe this is the primary reason that
satin finish black lacquer is the choice for professional pianos that
have to be moved often.
Karl Petersen
Meridian, Idaho
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