Boiled linseed oil, thinned with common mineral spirits, should work very
well. Wipe on, wipe off, then dispose of rags as per directions on the
linseed oil can.


wrote in message
oups.com...
I have a black slate fireplace surround and I've drop acetone on the
slate which removed a portion of the black finish to show the true gray
color. I don't believe the slate is painted, but stained in some way.

Does anyone know of a slate staining product I could apply to my slate
surround so it has a nice new black finish?