Renaissance wax is good stuff. I like Liberon a little better, as it smells better, not as bothersome to work with for lengthy sessions. Both are excellent waxes. Either of these waxes are friendly, ( i.e. not excessive carnuba which makes the wax more difficult to buff)
For waxing Ebony, or any dark wood for that matter, I like to melt some wax in a double boiler, and add a bit of artist oil paint, like Black for Ebony, or a color darker than the wood to be waxed. Just enough to turn the melted wax black. Let the wax cool to solid again prior to using. Using the wax straight out of the can ( white) can leave a hazy look. I mix this in good size batches and store it in small friction cans for later use. The artist oil does not affect the 'handling' of the wax, use it exactly ase you would untinted.