Finishing question/Black sanding sealer

[PIANO2NR@AOL.COM]

In a message dated 10/5/99 7:36:34 AM Eastern Daylight Time, 
klavier@annap.infi.net writes:

<< For ebony finishes, stain makes little difference.  I fill with paste
 filler, sand, use a black sanding sealer, then black lacquer.
  >>
Where do you get black sanding sealer?  I've been looking for a black primer 
for years and have only been able to find a very dark grey.

Randy Mangus, RPT