Very little experience with Ebony but seem to remember that it is an oily wood and, as such, will need to be cleaned with acetone or lacquer thinner...
Ex-Vietnam enlisted Marine grunt, former sea kayaking instructor and tour operator, BSCE Tufts University 1972 1/2, grandfather of 2, former mountaineer and rock climber,non-metallic materials specialist, usually paid NOT to sing, and I tilt at windmills