Try the black polish available from Kingdom Restorations. It's very black and dries instantly.
Casey

Here is a link that might be useful: Kingdom Restorations

India ink.......you don't want to use anything waxy because that may hinder the eventual "real" repair.
You just want to dye the base wood...
India ink!
Linda C

Black Marks-a-lot has worked wonders for me :^)

Marks-a-lot???? Are you kidding me????

I use a Sharpie. :)

Duh....I use it when I spill bleach on black jeans....never thought of it for furniture....and Sharpies come in colors!!

Yeah, but after a few years, Sharpies fade.
So in a few years, reapply ;-)

I had to use a brown Sharpie to cover up some paint slop (not mine!) (mostly) that I couldn't remove from some old old stained crown moulding. High ceilings are the best for that sort of touchup!

Thanks, everyone, for your input!

I used a Sharpie some years ago, and wasn't all that happy with purple undertones in the black. I think I'll try the India ink this time.

I wonder how much it would cost to have the veneer replaced. And I wonder if veneer can be made to match the rest of the old wood. Shiny new black veneer would stand out like a sore thumb.....

It'll look better than a Sharpie!

I didn't know we had Sharpie furniture markers! (They all appear to be brown, though.)

Here is a link that might be useful: Sharpie furniture markers on eBay

Hahaha. I know Min-Wax makes stain pens that can be handy but I didn't know Sharpie was getting in on it. Stain pens don't cover paint, so didn't work for my moulding. A good old fashioned India ink pen from an art/craft store might be the way to go for the piano. Test a leg first, of course!