Pianotech

When you have a white finish, getting a perfect match is next to impossible.  Because this is on the edge, you might get away with just getting it close.  I don't know about the new UV curing resins.  I saw the system at Reno, and purchased the kit but haven't tried it out.  If it was me, I'd take a cheek block to an automotive paint store to have a custom match made in a spray can.  Bondo, or polyester sanding coat and primer to fill in the gouges, then topcoat with your custom lacquer or enamel spray.  Optional clear coat. 

If this was on the top panel or anywhere there is damage on a large open surface, I'd recommend doing the whole panel rather than spot it in.

I would suggest a polyester specialist. 

Peter Grey Piano Doctor 

When you have a white finish, getting a perfect match is next to impossible.  Because this is on the edge, you might get away with just getting it close.  I don't know about the new UV curing resins.  I saw the system at Reno, and purchased the kit but haven't tried it out.  If it was me, I'd take a cheek block to an automotive paint store to have a custom match made in a spray can.  Bondo, or polyester sanding coat and primer to fill in the gouges, then topcoat with your custom lacquer or enamel spray.  Optional clear coat. 

If this was on the top panel or anywhere there is damage on a large open surface, I'd recommend doing the whole panel rather than spot it in.

I don't think this finish is polyester.  It's more likely urethane.  You could contact Kawai and ask.  Maybe Don Mannino would know.  Kawai might have the factory color available.  Even if this finish is polyester, and you have the factory color, you'll always see where the old and new material meet.  At least that is my experience. 

I would suggest a polyester specialist. 

Peter Grey Piano Doctor