Acetone/keytop mix?

[Mark Dierauf]

  I have heard that the basic recipe for the hammer hardner used by S&S is "One
keytop for about a cup of acetone".  I have some ground keytop material and was
wondering if anyone could suggest what the recipe would be using this ground
material instead of whole keytops. Any other suggestions as to it's use would
also be appreciated.

                  Mark Dierauf