When I was working with Tim Soper in Chantilly, VA, he had a new
product called "Formby's Finish Remover."  This works great because
the old steel wool is not involved in the process.

A certain amount of liquid is set aside in a bucket, then wiped on
with a cloth.  You continue to apply the liquid with a cloth until it
releases the old layer that you do not want and you are down to the
original finish without having to use the "elbow grease."  All you do
is wipe of the remaining liquid.

I have restored a number of items and I was completely thrilled with
the job that this liquid did in the first stage of refinishing.  And
refinishing a piano can be a long, laborious process unless you have
some of the newer items to make a long job easier to do.

Charles Davis